Lake Tahoe

Emerald Bay, Lake Tahoe

Lake Tahoe is one of a kind landscapes in America.

The region and mountains were formed first by a normal fault from the North American Plate to the Pacific plate colliding, during the subduction phase many volcanoes and granite formed. The steep landscape, batholiths, and intrusive rocks found in the region support this formation. The depth of Lake Tahoe was later formed by two smaller faults on the shorelines that sunk the graben land in thousands of feet. Forming what is Lake Tahoe today. The last Glacier period for Tahoe ended 10,000 years ago.

A view of a Col, western side of Tahoe

These glaciers forced boulders, or till, out to form a terminal moraines, where water was blocked from lake Tahoe and formed Fallen LeafLake. Emerald Bayexpose's evidence of a glacier with Cirques, the bowl like landforms, Many little lakes called tarns are present. Some Col's that are seen show the passing between glaciers. Alongside those Col's are several U-shaped valleys. There seems to be only smaller horns on the Emerald Bay side of the lake.

Fallen Leaf Lake

What will the landscape of Tahoe look like in the future?

The eastern shoreline, flatter then the west

In 1,000 years ...

I predict that Lake Tahoe's eastern side will have flattened out more because of the mass wasting and the snow that are left now year around will melt and drown the Truckee river valley. The eastern end of the lake on the leeward side of the mountain experiences both extreme cold and hot temperatures during the seasons. The mountains are mostly wasting from frost weathering, pressure release of the large rocks, or root weathering. But because of the rainshowdow effect on th eleeward side of the mountain range mudflows and debris flows continously occur, erroding the shoreline into the lake. Once the western side of the lake continues(like the present) to become flat it will not get the same amount of percipitation because it does not have the eastern mountain side to hold the moisture from the storms in.

Reno/Truckee veiw of Seierra's

The vegetation life will be much like Reno's desert weather today. I feel that the water will be highly permeable as humanity continues to pollute the water. The South Lake Tahoe city has moved up on the mountain because the water level rose with the melting of the glaciers and flooded the basin.

In 10,000 years...

I predict that we will be exiting the mini ice age scientist say we are entering. I think the Canadian glacier will not reach Tahoe but because global temperatures have fallen and with the regions high elevation glaciers are able to form and cover, once again, the basin and

valley's. Summer snow in Tahoe

At 1,000,000 years...

I feel the earth will start moving again and the four different fault lines that fall underneath tahoe basin will move. Sierra mountain range will rise higher then before to 20,000 feet with volcanoes melting all the glaciers. Present day you can find the basalt lava flows on the western side of the lake where the mountains rose to 15,000 feet.

Eagle Rock found in Tahoe Basin. Evidence of volcanic basalt flow.