NAGT_FWS_Fall_2012

I had the pleasure and privilege of guiding a group of adventurous college geoscience professors and students through the 20 Lakes Basin near Tioga Pass. I appreciated their patience with me since it was the first field trip for professionals that I had ever led. Despite a few changes to the timing of the trip stops (and outright eliminating several stops) the group was enthusiastic and got to experience the convoluted geologic history of the area. To learn more about the geology and climatology of the area, please download our full-color field guide.
  • RJH4156 First stop of the day was near Greenstone Creek (Stops 2-4).
  • RJH4161 I'm not quite sure we came to an agreement on how the unusual sphere shapes were formed in the meta-andestitic tuffs and flows.
  • RJH4163 Folds within the adesitic rocks.
  • RJH4164 The group enjoys a conversation around a glacial erratic that contains xenoliths or enclaves.
  • RJH4168 Southern end of Shepherd Crest East.
  • RJH4169 Peanut was quietly devising a plan to catch the fish in Wasco Lake.
  • RJH3598 Vertically-dipping Jurassic meta-sandstone.
  • RJH4176 Steelhead Lake (Stop #9)
  • RJH4177 Cascade Lake with North Peak looming large. Cathedral Peak Granite.
  • RJH4178 Field trip participants admire their surroundings.
  • RJH4181
  • RJH4182 Intrusive quartz veins cross-cutting the Jurrasic meta-sandstones near the contact with the sandstone and Cathedral Peak granite.
  • RJH4183 Excellent epidote-rich boudinage: the sausage-look is a result of the rocks being stretched and broken during metamorphism.
  • RJH4185 The epidote was grand! (Near stop # 12)
  • RJH4186 Peanut enjoys the hike and large erratic near stop #16.
  • RJH4187 Interesting extensional cracks that have been filled with epidote. (Field of view in this photo is about two feet).
  • RJH4188 Jose, a very helpful member of the MJC Geology Club enjoyed his very first trip to the Eastern Sierra.
  • pika
  • RJH4189 There was lots of geology to discuss at each stop, which is why the group got a a bit strung out.
  • RJH4192 Wavy gravy near stop #12.
  • RJH4193 The Saddlebag Hike was not for the faint of heart. There was a good deal of scrambling and bouldering.
  • RJH4195 -Shamrock Lake looking Northeast towards Lundy Canyon. (near stop #19).
  • RJH4196 Garnets in a small quartz vein.
  • RJH4197 Conglomorate of Cooney Lake, but near stop #20.
  • RJH4198 That thar is a lot of conglomorate. Download and read the field guide to learn more!
  • RJH3465