There’s More to Discover on a Lake Tahoe Vacation
Aside from the fact that Lake Tahoe is a popular destination, getting to know the origins of Lake Tahoe can be as challenging as an extreme sporting adventure.
For starters, the Lake Tahoe Basin took form as a geologic block fault about 2 million years ago.
A geologic block fault is a fracture in the earth's crust causing blocks of land to move up or down, which is a primary cause of earthquakes.
It is this fault movement where uplifted blocks created the Carson Range on the east and the Sierra Nevada mountains on the west, while the down-dropped blocks, also called a graben, created the shear between the Sierra Nevada Microplate and North America.
On the other hand, the Lake Tahoe basin is formed by a series of large down-to-the-east normal faults, including the West Tahoe and Dollar Point fault, the Stateline and North Tahoe fault and the Incline Village fault.
Most of the highest peaks that can be found of the Lake Tahoe Basin that formed during the creation of process of Lake Tahoe creation are Freel Peak at 10,891 ft, Monument Peak at 10,067 ft, Pyramid Peak at 9,983 ft in the Desolation Wilderness and Mount Tallac at 9,735 ft.
As the geologic formations began to take shape, eruptions from the now-extinct volcano Mount Pluto formed a dam on the north side, as melting snow filled the southern and lowest part of the basin to form the ancestral Lake Tahoe as rain and runoff added more water to the lake.
Lake Tahoe was shaped and landscaped by scouring glaciers during the Ice Ages, which began a million or more years ago and is fed from 63 tributaries with the Truckee River as the main and only outlet.
The Truckee flows northeast through Reno, Nevada and into Pyramid Lake, which has no outlet.
The soil found on the basin come primarily from andesitic volcanic rocks and granodiorite, with minor areas of metamorphic rock.
Some of the valley bottoms and lower hill slopes are covered with glacial moraines, or glacial outwash material derived from the parent rock.
With the great depth of Lake Tahoe, as well as the locations of the normal faults within the deepest portions of the lake, suggests that earthquakes on these faults can trigger tsunamis with wave heights predicted to be around 10 to 33 ft in height, capable of traversing the entire lake in just a few minutes.
This may be evident with the massive collapse of the western edge of the basin that formed McKinney Bay around 50,000 years ago which was thought to have generated a tsunami wave with an estimated height of no less than 330 ft.
Although Lake Tahoe is a natural lake and with most areas consider protected, it is also used for water storage by the Truckee-Carson Irrigation District, for which the lake level is controlled by a dam at the Truckee River- the lake’s only outlet- at Tahoe City.
The 6 foot high dam can increase the lake's capacity by 732,000 acre/ft.
So if you think that lake Tahoe is just a vacation spot, think again, there’s more to discover in a Lake Tahoe vacation.
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