- 1 What landscapes did the Missoula Floods create?
- 2 Where did Glacial Lake Missoula drain?
- 3 How many times did Glacial Lake Missoula flood?
- 4 Does Lake Missoula still exist?
- 5 Could the Missoula Floods happen again?
- 6 What is the biggest flood in history?
- 7 Why did Lake Missoula flood?
- 8 What happened to Glacial Lake Missoula at the end of the last ice age?
- 9 How many days did it take Glacial Lake Missoula to drain?
- 10 How long did the Ice Age floods last?
- 11 What was the biggest flood in Washington state?
- 12 How many Ice Age floods passed through the Columbia Gorge?
- 13 Who was the first person to present the theory of the Lake Missoula Floods?
- 14 Which flood caused human error?
- 15 When was the most recent ice age?
What landscapes did the Missoula Floods create?
During the last ice age, 18,000 to 13,000 years ago, the landscape of eastern Washington was repeatedly scoured by massive floods. They carved canyons, cut waterfalls, and sculpted a terrain of braided waterways today known as the Channeled Scablands.
Where did Glacial Lake Missoula drain?
The basin drains from the Polson Moraine at the south end of Flathead Lake, south to Ravalli, with a major lobe up the Little Bitterroot River and a minor basin on Camas Creek near Perma.
How many times did Glacial Lake Missoula flood?
Today we know that this event occurred not just once but 40 or more times. We also have learned it is not unique to the Pacific Northwest and that catastrophic floods have occurred other places in the world. Glacial Lake Missoula at highest level of about 4200 ft.
Does Lake Missoula still exist?
The ice dam was over 2000 feet tall. Glacial Lake Missoula was as big as Lakes Erie and Ontario combined. Car-sized boulders embedded in ice floated some 500 miles; they can still be seen today!
Could the Missoula Floods happen again?
Could huge floods on this scale happen again? Although global warming may now be a serious concern, it is likely that long-term climate cycles will cause large ice sheets to return at some time in the distant future, and cataclysmic outburst floods will probably recur in this region.
What is the biggest flood in history?
The largest known meteorological flood—one caused by rainfall, as in the current Mississippi River flood—happened in 1953, when the Amazon River overflowed.
Why did Lake Missoula flood?
These floods were the result of periodic sudden ruptures of the ice dam on the Clark Fork River that created Glacial Lake Missoula. After each ice dam rupture, the waters of the lake would rush down the Clark Fork and the Columbia River, flooding much of eastern Washington and the Willamette Valley in western Oregon.
What happened to Glacial Lake Missoula at the end of the last ice age?
At the end of the last Ice Age, about 18,000 to 15,000 years ago, an ice dam in northern Idaho created Glacial Lake Missoula in Montana. The ice dam burst and released flood waters across Washington and down the Columbia River back flooding into Oregon before eventually reaching the Pacific Ocean.
How many days did it take Glacial Lake Missoula to drain?
The repeated filling and collapse of the ice dam would drain an inland sea the size of Lake Erie and Lake Ontario in two days. At its greatest extent, Glacial Lake Missoula stretched eastward a distance of some 200 miles. When the lake rose high enough, it burst through the ice dam.
How long did the Ice Age floods last?
Floods that equaled half the volume of Lake Michigan but only lasting a week, tearing across the landscape at 80 miles per hour, transforming every thing in its path.
What was the biggest flood in Washington state?
The National Oceanic and Atmospheric Administration (NOAA) says 1942 holds the record, measured at the southwest waterfront, followed closely by the monster flood of 1936. Old news accounts agree. The 1942 flood was brought on by 5.4 inches of rain that fell in Washington over 77 hours in the third week of October.
How many Ice Age floods passed through the Columbia Gorge?
At least two floods seem to have passed down the Columbia valley after the last of the Missoula floods, including a large flood about ~14 ka likely from cataclysmic demise of the thinning Okanogan ice lobe dam impounding glacial Lake Columbia.
Who was the first person to present the theory of the Lake Missoula Floods?
In 1940, Pardee went public with his theory about Lake Missoula, stating his belief that the entire lake had drained catastrophically. In 1965, age 82, Bretz received a telegram of surrender from the remaining disbelieving geologists (many others were dead by now).
Which flood caused human error?
Question 72 out of 2 points Which flood was caused by human error? Selected Answer:The Teton Dam breach flood Answers:The Indian Ocean tsunamiThe Teton Dam breach flood The Big Thompson Canyon flood The Lake Missoula flood Question 82 out of 2 points Which flood was the result of an ice dam failure?
When was the most recent ice age?
Striking during the time period known as the Pleistocene Epoch, this ice age started about 2.6 million years ago and lasted until roughly 11,000 years ago. Like all the others, the most recent ice age brought a series of glacial advances and retreats.