4 comments on “Two Excellent California Maps Are Great Resources For Hikers (And Everyone Else too)

  1. I’m happy at least one hiker is patient enough to try and decipher geologic maps! It’s of course difficult to get down to hiking trail-scale with a state-wide map. For that you’d need regional or quad-scale geologic maps, which I’m sure are available through the CGS or USGS. Always remember to look at ages and the faults and other structures when you’re looking at reasons for, say, the separation of the Sierra Nevada and Klamaths, as related to Cascade volcanism. Great post!

  2. Also, gabbro and ultramafic rocks are often very closely related to each other, whereas granitic rocks tend to occur in different environments. The fact these are close to each other in NoCal is testament to the juxtaposition caused by accretion.

    • I am glad you liked it too! I spent a fair amount of time checking out my old stomping grounds in Texas on the national map. I really appreciated the contrast it drew between the Llano Uplift and the rest of the Edwards Plateau. That brought a lot of clarity to the places I hiked (or 4×4’ed as it may be out in Katemcy) while I was in school out there. Same for the Wichitas; an island of granite out in the plains.

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