I would choose to study glaciation in northern California, as that is something I did not know ever existed and I find it interesting. The first place I would need to visit is Lake Tahoe (who wouldn't want to go there?). A glacial era occured in Northern California from 1.8 million years ago to about 10,000 years ago. These glacial events are evidenced in lakes such as Lake Tahoe.Places such as Lake Tahoe are the effect of U-Shaped glacial troughs, horns, and cirques. The glacial features can further be evidenced in the erosion evidenced on the rocks.

I would then want to visit Sierra Nevada, where glaciers are still prevalent. The Palisade Glacier (pictured below) is the largest glacier within Sierra Nevada. Moraine is glacial debris which consolidated and can drift down to the glacier's edge through glacial movement.

The last place I would request to visit would be the Trinity Alps, for reasons similar to Lake Tahoe. Erosion effects can be seen, and parts of the lake are formed from that erosion of glacial features. The color of the water is similar to that of Lake Tahoe's, but the Trinity Alps are in more of a mountainous area.

Overall, we can see that the glacial features are possibly diminishing with time. One such evidence can be found in the San Joaquin River, which was not always there but was perhaps formed with the help of glacial features.