FAQ: Where Is The Glacial Lake Missoula Rock Marker Located?

Where is Glacial Lake Missoula located?

The Glacial Lake Missoula National Natural Landmark is located about 110 kilometres (68 mi) northwest of Missoula, Montana, at the north end of the Camas Prairie Valley, just east of Montana Highway 382 and Macfarlane Ranch.

What is the evidence for Glacial Lake Missoula?

In 1942, Pardee published a paper suggesting that “giant ripple marks” with heights of 15-30 feet were evidence that deep and swift flowing currents had passed through the area near Paradise, Montana. Pardee attributed this phenomenon to the sudden failure of the ice dam that impounded Glacial Lake Missoula.

Why did Glacial Lake Missoula drain?

Glacial Lake Missoula formed as the Cordilleran Ice Sheet dammed the Clark Fork River just as it entered Idaho. The rising water behind the glacial dam weakened it until water burst through in a catastrophic flood that raced across Idaho, Oregon, and Washington toward the Pacific Ocean.

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What happened after Glacial Lake Missoula broke through the ice dam?

Glacial Lake Missoula stretched eastward for some 200 miles and contained more water than Lake Erie and Lake Ontario combined. When the highest of these ice dams failed, lake water burst through, shooting out at a rate 10 times the combined flow of all the rivers of the world.

What does the L mean in Missoula?

The “L” – The letter “L” cemented onto the face of Mount Jumbo represents Loyola Sacred Heart Catholic High School, situated at the base of the mountain. The trail to the “L” gains 500 feet in elevation over 1.5 miles. ( Wikipedia)

How long did Lake Agassiz exist?

The history of Lake Agassiz in North Dakota covers approximately 2,700 years, from 11,700 years ago until 9,000 years ago.

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.

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.

What lakes were formed as ice retreated during the last ice age 14 thousand years ago?

Retreating ice sheet The retreating glaciers of the last ice age, both depressed the terrain with their mass and provided a source of meltwater that was confined against the ice mass. Lake Algonquin is an example of a proglacial lake that existed in east-central North America at the time of the last ice age.

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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.

What geological evidence did the Bonneville flood leave behind?

The evidence indicates that it existed at least 600,000 years ago. As the climate became cooler and wetter, Lake Bonneville expanded in size, gradually spreading over a surface area of about 20,000 square miles and overlapping into Nevada and Idaho. Because Lake Bonneville was in a basin, it lacked natural outlets.

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.

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).

How many years ago were the floods that made the Coulee?

The multiple floods that carved the river’s course between modern-day eastern Washington and the Pacific Ocean occurred between 12,800 and 15,000 years ago, at the end of the last ice age.

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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.

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