Flood Geology | Episode 3 | The Missoula Flood | Michael J. Oard
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- Опубликовано: 7 сен 2024
- Meteorologist Michael J. Oard takes you on a tour down the path of the Missoula Flood, from Montana to Oregon.
In the 1920’s J. Harland Bretz, a secular geologist proposed a massive flood across eastern Washington. He was rejected by his colleagues because the flood seemed too “biblical”. He was shunned, for forty years, until satellite images proved him right. Scientist Michael Oard explores the Missoula Flood, demonstrating how the geologic features are a small scale example of the Genesis Flood. Michael Oard will take you on a tour of the ancient shorelines, lake sediments, glacial moraines, over-deepened lakes, gravel bars, channeled scablands, coulees, giant dry falls, silt hills, giant ripple marks, catastrophically cut basalt canyons, sediment rhythmites, and glacial erratics. He’ll present strong evidence there was only one Missoula Flood, caused by the single Ice Age, after the Global Flood, all happening just a few thousand years ago. Michael J. Oard will then apply the effects of the Missoula Flood to how the Global Flood impacted our earth.
Stars: Michael J. Oard
The Lake Missoula Floods have fascinated me for years. In the 90's I lived in Emmett Idaho, about 25 miles northwest of Boise. Driving into town on Hwy 16 the road runs along and through some foot hills. There was terracing on the hill sides. I always wondered what caused it. It looks just like the marks on the hillside shown at 4:39. I never noticed the similarity until now. If there was water filling that valley up to that level there would have been a huge lake there at some time too. I grew up 100 miles south of Portland. There were 3 big rocks on the slope of our hillside. One was probably 8' tall. My grandpa was building fence maybe 200' feet above the rocks where he found sea shells in a post hole he was digging.
That's interesting.
I'm an old man now and I've come to believe the unbelievable, not just geography, but other subjects that were and still are considered outlandish are true or at least partially true. When you look at the evidence here it's obvious a huge amount of water rushed through that large area. Amazing to hear the past being brought to light. Much appreciated.
I live in spokane and have traveled to most of these places. Your explanation of the catastrophe is spot on.
I'm a long haul truck driver from Florida and have been lucky enough to have seen the "ancient sea shorelines" driving across Interstate-90 in Montana.
Being from Florida which is flat as a pancake I loved running out west through Wyoming, Utah, Montana and the other Western states, until I got the cities. Once I got near the coast, Seattle, Portland and California it wasn't so much fun anymore.
The older I get I am beginning to put a few things into better perspective. One thing I am seeing for sure is how accurate the Biblical assessment of man's moral/spiritual condition is. Secondly, that there is a secret spirit at work in all the works of man that is serving the purpose of further Blinding/Deceiving men as to the state of his true condition.
Amen.
I’m right there with you, God is the only truth in this satanic, insidious world in which we are enslaved.
Agreed
You see well.
Me too
Most informative video on this area and the Missoula flood.
Fabulous Work Mr. Michael J. Oard !!!!!
Here in WV you can find seashells at the peaks of so.e mountains that are very high. So interesting.
While hiking around in Asia, I found seashells on mountains, at around 4,000 feet altitude. I knew what it meant, others were like "oh, wow! a 50 million year old fossil!"
@@KingPendragon77 Well at least the people you hike with have some common sense.
@@KingPendragon77 So lets see! You apparently believe that it rained "40 days and nights", the waters rose to the tops of the "highest hills", "All the high hills under the whole heaven were covered". That means the whole earth
Do you realize that if ALL the water in the atmosphere at this moment rained down on earth, it would put 1 inch on the whole earth? Do you realize that if ALL the ice on earth suddenly melted, it would raise the sealevel roughly 230 ft? The floor of the valleys in Turkey are far FAR higher than that. Literally thousands of feet
At one place it says the waters rose "15 cubits". That is only 22ft.
So lets say that the waters receded after about 1 year. (read Genesis!) That would never have been enough time for any sea creatures to be living upon any mountains four thousand feet high. And again, there is not any water on earth which could reach that level anyway
Every culture on earth has experience local floods. They are terrifying. And as the centuries and millennia pass the stories are embellished. This story was in the epic of Gilgamesh, and was brought out of Ur by Abraham.. In that area of the world, it was much believed and repeated. Today we understand it is just a legend, and not to be taken literally
There was not only 8 people on earth only 4400 years ago. Study of genetics will well demo that fact
And no, these facts actually do NOTHING to detract from the existence of a Creator being, but it does kind of destroy some of the silly dogma of religions about that creator being
As Proverb observes, "knowledge shall increase' And so it has, knowledge about everything there is
WV had the layers of tree bark deposited to make all that coal. It has definitely been underwater . Is genesis history has better explanation of that than I .
I just learned about the Ice Age Flood when I visited the Beacon Rock recently and it sparked my curiosity about the great Lake Missoula Flood. These are awesome facts and evidences. Every human being should know about this. I am sharing this videos to my friends and family members. Thank you for having this video. I was totally blown away. Thank you so much!
30 minutes of viewing, no less than 8 ads inserted. Screw off, RUclips.
Excellent series. Great information 👍 Thank you for Sharing ❤️ 🙏
Extremely well put together, Thanks
I’ve heard many explanations for the geology of the Scablands. This one seems more plausible.
"In that same hour he rejoiced in the Holy Spirit and said, I thank you, Father, Lord of Heaven and Earth, that you have hidden these things from the wise and understanding and revealed them to Little children; Yes, Father, for such was your gracious will". Luke 10 verse 21
Hi Mike, great info here. You've resparked my interest in the genesis flood.
Time gives us better understanding and slows the game down
It's an even bigger challenge for mainstream geologists. Nick Zenter has videos about this, and he can't figure out the gravels, or the rhythmites because that's what mainstream geologists claim indicate more than one flood event, which is patently ridiculous. I think, because of those gravels, the lake Missoula flood was trapped runoff from the Great Flood. It filled valleys that no longer exist, with blockages of debris from the draining floodwaters, forming lake Missoula, and it was much longer through the valleys. The post flood uplift caused it to overtop the barrier at one end, gouging away the valleys as it ran off.
Thank you very well done learned a lot
For my previous comment below, Im just a heavy equipment operator on surface coal mines in Eastern Kentucky. I have about 25 years on surface mines & limestone rock quarries in my area. I've seen evidence in the form of shell like fossils, ferns imprinted on rock, a fish skeleton imprinted on sandstone rock, petrified trees & branches, & what we call "kettle bottoms"....which are an oval shaped schale type rock. I've read thst those form in voids where a tree uprooted & fell. Leaving a void in the ground that filled with debris & over time, with heat & compression they formed.
How does coal form & how long do you think it takes to form?
...I am not certain why I decided to watch this video. I am completely unqualified to fully understand all the information this gentleman presents. However, around the one (1) hour mark of this presentation, as he continues to discuss the "wall" that displays the "40 rhythmites". With that I realized that we are told, that it rained for 40 days and nights. It then took 150 days for the "waters to recede". The increase and decrease of the waters, these two time elements, are sufficient periods in order to create such an example as the wall that he offered.
A lot of the signs like ancient shorelines are very similar to what we have here in Utah. Both Lake Missoula and Lake Bonneville were simply remnants of the flood of Noah.
At the most a relatively small flood when an ice dam burst at the end of the last ice age.The unproven fairy tale of noah deceived millions and responsible for only more intolerance.We have passed that primitive level of ignorance a long time ago.
@@BobSmith-ew5oi How little you know.
I enjoyed reading your book about The Lake Missoula contraversy
Very interesting!
Great delivery and empirical evidence of a great flood and so very interesting I live in Adelaide South Australia 🇦🇺 close to the Flinders Ranges and the receding waters divided the land and formed peninsulas also the formation of gorges and valleys and deep divides such as the River Murray basin and exit into the sea 🌊 I have been interested in geology for all my 62 years and love 💎 gemstones, types of rocks, geological formations and of course the Flinders Ranges which are exceeding beautiful with delightful gorges such a Bracina Gorge. I found yr video so interesting I never considered the effect of a global flood washing off the continents and the geological formations My question is what caused the flood that made the waters from above and below lose their positions and even revealed the sun ☀ and formed the seas I believe it was the passing of the planet Nibiru and the gravitational pull I think a meteorite may have hit south of America but really not sure could u plz answer this puzzling question 🙋 Love Sandy from Adelaide Australia 🇦🇺
...Hello Sandy...this is John from N.E. Ohio, just South of Lake Erie. I am not aware if you have considered that: at the time of the biblical Flood, there was only a single land mass. That land mass is known as Pangea. This great flood would cause the Tectonic Plates (12 in all) to begin to separate one from another. So prior to this actual plate movement, the receding water flow would be in similar directional patterns. As the continents have rotated away from each other, these erosion patterns do not appear to be similar. Yet, if the continents are rotated back into one land mass...the erosion patterns are identical. Interesting, isn't it? Generating far more questions...all to be answered by the same "consideration". Have a wonderful day...
Or ice could have kept plugging the spillway untill it finally ALL melted then the damn blew out
I think it was the tide leaving those shoreline lines as it filled
The "aftrata fan" is spelled Ephrata, as in Ephrata, Washington, just a few miles south of Soap Lake, Washington, which is just a few miles south of Dry Falls. This video would be better if the makers had seen the 'Missoula Flood' videos from Nick Zentner of Central Washington University in Ellensberg, Washington first. But... it is a good video. Thanks to the makers.
Not convinced. It was interesting to learn about the Missoula Flood. However, your correlation to the Bibical flood is like flat earth theory it fits if you only consider this one aspect at a time but put all of the evidence together and sorry, young earth doesn't stand up.
Now I notice you said nothing about if Diety exists or not. And that's important here. This isn't about if any particular god exists or not - it's about the dangers of literal thinking and blindness to reality.
And strictly speaking?
Genesis is far, far removed from a science text.
Well said.
Love the photography
Sorry but if there was only one musula flood then why do you have flood deposits both above and below the Bonneville deposit layer
The deposit happened during the flood.
Could the rhythmites be from tsunami activity during the Rocky Mountain and Cascade Mountain formation? The tsunami activity could in part be causation for initiating the Missoula floods and/or some other lesser flooding following Genesis Flood. 🤷♂️
Maybe the lake Missoula flood was one of the last big catastrophe that occurred about 12 to 14 thousand years ago. It could have wiped out millions of people. I think the mounds we have in North America like the serpent mound in Ohio & one just a couple miles west of the Mississippi are from people that are decended from, survive, & witnessed the change in the environment. Check out randell carlson & Graham Hancock
Yup. Serpent Mound is right next to a huge meteor crator too. Try to imagine you're an early human. What would a comet descending to earth look like? It would look like a flying serpent.
Greetings from the BIG SKY. I've hiked Montana and seen the places flushed out.
I hesitated to watch this because of the channel name, but the geology was really good. Whitney rejected John Muir's assessment of how the Yosemite Valley was formed for the same dogmatic reasons.
When at first its difficult to understand what your looking at it is perplexing. However gradually as pieces of the puzzle are put together a almost full picture comes in view. Thank you for this further insight.
kdagPlymouthUK
2023April21st
I've often wondered if mt Hood blew and developed a lava flow that damed up the Columbia river to the rims how much of the western territories would flood.
Do the rhythmites demonstrate the fountains of the deep that are mentioned in Genesis?
Devils tower is an ancient tree stump.. signs on earth wonders in heaven!!
no dinosaurs in the Bible. so the Biblical stuff is quite recent.
Thanks!
Wasn’t the Boniville flood bigger though the lake took longer to drain.
Nick Zentner has some good videos about the Missooula flood/s.
How do you explain the layer of my saint Helens ash in the middle of the sediments ( I've seen them) if there was only one flood. And how can he say it was x times a biblical flood when there is no way to back it up?
He said that Noah's flood was much greater than the Missoula one, not the other way around.
@@johndoiron9615 Which doesn't answer the question, does it?
It can't be explained by one flood. This biblical flood is like the bible itself. Fiction.
AGREED! 2 Realms. 2 Leaders/Rulers. 2 Methods of Governance...God the genius multitasker demonstrating His CREATIVE management skills against His foolish nefarious adversary the DESTROYER...(as a side note, at 59:45 the presenter shows a very revealing RECENT event, PROVING erosion can happen in a VERY SHORT period of time.
The Glacial Lake Missoula floods actually disproves the Genesis flood since deposits from it have been firmly dated using multiple dating methods as having occurred repeatedly between 20,000 and 15,000 years ago. The methods used to date the deposits include, but are not limited to radiometric dating. They have also been dated using magnetic dating, which uses changes in the location of Earth's magnetic poles, among other methods. It is evident that the lake waters broke through the glacial dam many times, each time emptying a volume of water roughly equivalent to the half the volume of current day Lake Superior in a matter of days.
You can tell by looking that the flood that carved the Channelled Scab Lands was not the same process that carved the Grand Canyon. Note the stair step fashion in which the Grand Canyon was carved, and the lack of a broad valley with pot holes drilled into it. Note also that there are no ancient beaches or giant ripples anywhere above Grand Canyon or any of the canyons above it as are found in the Channelled scab lands.
There is also a place called Lava Falls in the Grand Canyon where lava went over the edge of the canyon and down to the bottom in several pulses dating from 800,000 years ago to 100,000 years ago. These have been firmly dated now fewer than six dating methods, and overlay rock which is identical to the layers of rock the rest of the canyon was made of. The volcanic rock has eroded down by the river over the last 100,000 years, leaving the modern day rapid known as Lava Falls. It is important to note that the lava flowed down only one of the walls, and therefore could not have resulted in a dam of the same height all the way across the river. The lava on the far side of the canyon only goes a fraction of the way up, and is heavily eroded, Its layers are of identical composition to the layers of lava falls.
It is possible to imagine Noah's flood filling the canyons, but it is not possible that they cut the Grand Canyon in the same way as the Channelled Scablands were carved, or that Noah's flood carved them out at all, since many different dating techniques agree on the dates for the various stratigraphic layers found in the Grand Canyon. We also know pretty precisely when the rocks which form the cliff faces of the Channelled Scab Lands were laid down, and they do not correspond with the times when the rocks of the Grand Canyon were laid down. The Earth is very old, showing that one of God's days is not equal to one of our days, and that one of God's years is not the same as one of our years. It is not possible to date God, or to know what time he keeps. God is infinite as is his wisdom. The only other thing that we know of which is infinite is the Universe, and thereafter the Multiverse. All we can know is that his creation is amazing and beyond man's ability to create simply because of the sheer size of it going far out beyond even our own galaxy. It stretches beyond where our best equipment can see; so far that it causes light to change from white to red because of the delay over distance. He is in all of his creation which stretches through the infinity of space and beyond. This does not disprove His greatness. It just goes to show how vast and timeless His greatness and his creation is.
Dating methods are not accurate lmao come on !
Well here we are and I'm confused by this 'ice age' you keep mentioning. When was it, where was it and how long did it last?
There’s another video about the Ice Ge from the same channel
The Ice caps of the North and South poles. It is still here. "Climate change" has been going on for a few thousand years. Research Catastrophic Plate tectonics, the answers are there.
After the Great Flood of Genesis, about 4500 years ago, and it lasted a few hundred years.
❤ 🇮🇹🥾🍸 Documentario Eccellente. 👏
It’s hilarious because the Bible has been translated so many times that there’s many translation mistakes. Let alone how the gospels contradict themselves. Let’s not forget the the Christian “God” isn’t even the oldest know religion.
So I get it, but where did all the water come from? Right? There's only so much water and so much ice. So if you're saying that all this flood is coming from a worldwide flood. Where did all the water go?
The ice sheets were said to be 2 miles thick at some points and covered most of canada and northern united states. Thats an unfathomable amount of ice and water. All thats left now are scattered glaciers and permafrost. That ice/water went somewhere. It went south. The ocean level raised substantially too.
Thank you for sharing for the glory of God!
Tohu Wa Bohu
It became formless and void but created perfect
No knowing what occured nor any time frame understood
Old earth creation does not negate 6 days of creation in Genesis
Why do you say 4300 years ago? The Masoretic text has shortened the age of the fathers by 100 years each, against a vast number of better and much older textual witnesses.
Excellent point!
This flood was around 15k years ago, ismt the earth only 6k years old???
Re-read Genesis 1-8 to learn the chronology. There's no evidence for a 13,000 BC Flood
... but you are correct about the 4000 years B.C. Creation Date.
Yes, and no. That is the correct time frame for the Missoula flood(s). The earth itself is several billions of years old.
I'm sorry, but any notion that the "Genesis Flood" ever happened is ludicrous. It's nothing but fiction.
Oh ok because you say so...please back up what you think is ludicrous with what? FIRST THERE WAS NOTHING AND THEN BANG THERE WAS SOMETHING... Hmm. That sounds Ludicrous...
@@danieldostie4181 I'm sorry. You're concept of "Poof! God made it happen." is even more ludicrous. We have scientific evidence that strongly suggests the Big Bang happened. All you have is a book written by ignorant sheep herders.
WOW.
oard dismissed the velikovsky idea of migration of the north pole but i think the pole at the time of the ice age might have been at canada/north america.i havent seen evidence of glaciation in europe.where i lived in switzerland the morraines came down to 2000m instead of the 3000m present day glaciers.i have never been to scotland but i am not aware of evidence of glaciation.maybe oard can find something
Pole shift caused by upward thrusting of the Himalaya mountain range like spinning a bowling ball with a weight attached to the side. I think poles were at the Gobi desert and middle of Pacific.
Explained in book ' In The Beginning ' by Walt Brown
As far as the strand lines for lake Missoula go. The first flood was when the lake was at it’s highest. Never filled that high again. This is how you have the descending strand lines. Floods progressively got smaller and smaller.
Seems a bit suspicious that there is no mention of an ice age in the book
The Book's message isn't aimed at answering every geological event.
Once the families and animals left the ark, the 1,000 year ice age was witnessed mostly by folks who'd migrated North. -- Certainly, if the woolly mammoths could write, their ice age plight would have been chronicled by them...
You just Answered it every 12068 years clock cycle Senate bill 4488 2046
If they found the Ark, then the world flood occurred
If they didn't find the ark the global flood happened.
Well good news, they found the ark, right where scripture said it would be on top of Mount Ararat.
@@hughstan1 Er, the Wyatt one, right? Yeah. Not an ark. A rock formation.
To question the biblical flood is to question God.
I deny it!
PS: Let me correct this: I KNOW that the flood story is nonsense.
@@norbertjendruschj9121 and now you "know" different. Don't you? Where does the water come from? You must have read about it by now in dozens of evolution books and publications. Or is it they never mention it at all? I wonder why?
@@voiceofreason162 Because it never happened, Bill. That's why. The data directly show that there was no global flood. There are literally hundreds of different lines of proof. From palynology, to ostracods, to exothermic analysis, and sedimentology. And on and on and on. Your literal interpretation of Genesis is wrong.
@Milo Rossi BWAHAHAHAHA
just as Satan won't accept he won't replace God most evolutionists won't accept God created it all.
Didn't Jesus teach that God's will is done in heaven? How do you fit a satanic rebellion into that statement? Did Jesus just forget about a rebellion by millions of angels who followed this satan-fallen-angel character?
@@LanghamW1 God will is done.
Everything is made for His pleasure.
Not ours.
Real pleasure is knowing and not everyone will recieve the grace of God. Many are called, few are chosen. Without faith, one can not receive.
Walking dead. The human mind and the mind of the soul are separate entities always at odds.
The flesh vs the spirit- walking contradictions.
Which is why Judas Iscariot sold his own soul for 30 pieces of silver only to kill himself at the end.
Gods will be done and nothing man can conjure up can stop that fact.
Everything is spirits and principalities.
@@rdallas81
What has your comment got to do with anything I said?
Satan wanted to be LIKE God.
@@ReadersOfTheApocalypse and was cast out of heaven.
Pride. The offspring of satan.
Pride. The deadliest sin.
Secular academics: *This couldn't have been from a flood, that would be too biblical...*
Also secular academics: *A single flood doesn't fit our world view, there must've been 40 floods...*
Gotta love it. Lol.
Spot ON!
Except the Missoula flood happened about 11,000 years ago so there’s a problem we were allowed to believe what you like but you’re not allowed to lie about it
the only reason people reject any thing biblical is because that is what is taught them at university by university professors.
Approximately 8000 years off the mark but it’s still worthy…😊
🙂👍 TY
I don't understand religious scientists. This entire video series only describes area floods and not a global flood. The evidence for the global flood is then attributed to a fictional event by the same religious scientists in this documentary. Absolutely hilarious.
Evolution is a religion just like my Christianity is. God created everything in 6 days. Noah's Flood shaped our World.
If there weren't mentions of a global flood in the Bible, i think many geologists who are currently denying would have came to the same conclusion that there was a global flood.
Exactly!!!!!!! If they were not always trying to prove God isn’t Real they would Have told ALL the TRUTH a LONG TIME AGO. The D-evil is the Father of Lies.
No, they wouldn't have because they would have taken the time to look at all the data that directly contradicts it.
@@NorthForkFisherman what you believe contradicts the Bible. Is your misunderstanding about how Science works. Everything they say they know about the Earth. They weren’t around to observe. So take that back with you and try again.
@@xXGENDAMAGEXx The bible isn't literal. Real science shows that simply by looking at one single formation in the earth's crust.
@@NorthForkFisherman Your ignorance of the Earths crust is evident. The same layers exit all over the world at different elevations sometimes because of the movement of the tectonic plates during the Global flood. Your Science is fake science just like the fake news you probably watch. Evolution is fake science. Nothing gains genetic material when it changes. It looses genetic material from what God Originally Created in the begging. The Bible is the Beginning of all History, and the Key to Science.
🤣🤣🤣
The one problem you have with this senario is the dating you are giving. 4300 years is where you have it wrong. Think more in terms of 10,000 years at the end of the Younger Dryus Ice Age. When all the ice melted it had to go someplace. The flood is actually not even over yet because the flood plains of the planet are all under 300 feet of water. There was also another cataclysym at the beginning of the Younger Dryus when the earth suffered a cometary strike that originated from the Taurids and there is plenty of evidence of that. Just look at the Carolina basins that where caused by cometary strikes in Sudbury and Lake Nipigon. Also the Chipawaw crater in Greenland as well as several in Europe and Alaska. This caused the black layer that is everyplace on the globe. This is what plunged us into the last Ice Age.
I do want to say that other than your dating , you actually have a pretty good picture of things.
...perhaps these cometary strikes occurred DURING the first 150 days of Noah's Flood. Remember, the floodwaters continued to rise until the 150th day (when the waters began to recede)... After all, comets are ice balls, and their melt would have added to the water level.
@@petetumas6513 "cometary strikes"?
Woof. Why not just say you don't understand physics and believe in magic, Pete? It's simpler and faster for us all. We can just hop right to the point of ignoring you then.
@@NorthForkFisherman Given the degree of your studies, I'd anticipated a reasoned reply -- not this unstudied tripe coupled with veiled demurrer. There are realms of truth which you dismiss (likely due to bias). Hopefully you will have time to trust Jesus Christ the Creator (before it's too late).
@@petetumas6513 Depending on the size of the impacting body, a comet strike will release about 4.184 x 10^19 joules of heat energy. And you're talking multiple strikes? You really have no damn clue about what you're speaking because you're rattling it off like it's a bug on a window.
You are an absolute fool.
All of those canyons, that God created where in fact created by the Almighty. even the grandest, of all Grand canyons, there's no getting away from that. let's face it. God Did it that settles it.🤲
Nope
I perceive the humongous floods and geological movements were done during Geniuses 1:9. Because there is too much ancient architecture all over the world still standing which was probably pre Adam. Meaning some sort of civilization. Than came Noah's flood which made significant geological movements but not as much as Geniuses 1:9.
The Noahic Flood layered about a mile deep of sedimentary deposits worldwide - the twice-daily tides sloshed over the continents, providing stratified layering during the year-long (plus) Floodwater event.
Read Genesis 6-8
(Some ppl haven't read it
not have they done the math
The floodwaters covered the Earth. If it were a local flood,
there'd have been no need to invest 100+ years to construct such a huge vessel... If it was merely "local" Noah would have moved away from Mesopotamia
- and God wouldn't have sent all of the pairs of animals needed to repopulate the Earth. The LORD knows how to protect His godly followers... and He did!
There were several large floods after Noah's flood. Just like there were more aftershocks after the mega quakes during Noah's flood. Same with volcanic eruptions.
Angry Viking. Read the Bible, It clearly states there would be no more worldwide floods. Maybe, if you do read it, ask GOD for the explanation why.
@@lawrencewillard6370 smaller floods not other world floods. Floods caused by ice melt and big storms
"Same with volcanic eruptions."
The whole vulcanism thing is part of what shows that Noah's Flood, at least as a global one, is nothing more than a myth at best. Most likely it's just another retelling of seasonal flooding along the Euphrates or the refilling of the Black Sea.
Could it possibly happen again
Genesis 8:14-9:17
answers your question.
Every 12,000 years
It will happen again. We are currently in an interglacial period but the ice will return again; just as it has in the past. If you look into the Missoula floods you will find that there is evidence of much older floods dating from 100,000 years ago.