Rock Study #4: Granite!

This month we made sure to observe carefully the granite rocks in Yosemite National Park. We didn’t collect any because that isn’t allowed in a national park but we did learn a little more about the granites found there with a trip to the Visitor’s Center. They have a fabulous display of granites, showing the rock cycle and the way this particular granite was formed.

Everywhere you go in the park you are surrounded by granite! Granite of all shapes and sizes lines the trails and creates the majestic valley walls you see all around you. The biggest piece of granite that looms over you in the valley would be El Capitan.It is a rock climber’s heaven and we read in the Visitor’s Center that the granite that makes up El Capitan was cooled slowly which makes it particularly strong and resistant to erosion. We watched the climbers up there on the nearly 3,600 foot granite face…amazing courage to be up there!

The exhibit has many interesting facts about the granites of Yosemite National Park.

There were also samples of the different granites from different areas of the part…each one with a little different combination of elements. Fascinating!

So even though we didn’t actually collect a sample from Yosemite, we have plenty of other granite samples from our travels locally. We are continuing to work our way through the Rocks, Fossils, and Arrowheads book.

We have high hopes of studying two rocks in June as we travel to Oregon. I know that if we didn’t make this project part of the nature study goals for 2013 we would have let it drop. But, I am determined to get as many done this year as possible.