Spent a third straight weekend with students and fellow geologists in the field. I was pleased with the telephoto that allowed me to get an angle on a relatively inaccessible outcrop. I know I could just explain it, but so many of you seem to enjoy the challenge, so...what's going on here?Happy Easter, and a good spring-time to you all!
Update: Ron is absolutely right about the columnar jointing. What kind of volcanic rock, and why is the rock forming a flat-topped ridge?
I see columnar jointing...
ReplyDeleteIs it an example of inverted topography? A lava flow filled a valley, and then became stronger than the rock on the former ridgeline, so the rivers excavated the old ridgeline and left the old valley high and dry?
ReplyDeleteIs that one of the foothill latites?
ReplyDelete