Picture of the Day

Dikes of West Spanish Peak

November 9, 2021   ―-  Archive

Macro and Micro Picture of the Day 2021-11-09
License: Creative Commons Attribution 4.0 International License.

Here are some of the more than 500 dikes radiating out from West Spanish Peak in Las Animas County, Colorado. These dikes were formed at the same time as West Spanish Peak (24.59 million years ago), but the chemistry of the dike's rock is different from the mountain's. For more on this area's geology, see this 58 page USGS report in pdf format. The picture was taken on October 18, 2021.

Equipment used: Canon EOS Rebel T5i with a standard zoom lens (EF-S 18-55 mm).

Authors: Richard Hollos and Stefan Hollos