Visit to Upper High Dry Lakebed, August 5, 2007

Google Earth view of the GPS track at Upper High Dry

It looks like the GPS lost some accuracy while we were on the slope to the north, which is easy to do because the hill was probably blocking view of some satellites. There are two data points which look as if we climbed on top of the cliff. We didn't. I'll see if I can find and remove those data points and redo the image. But that's for later.


Joe stands in front of the remains of an 1800's covered wagon at Black Rock Hot Springs.


Black Rock Hot Springs


Black Rock Hot Springs


Black Rock Hot Springs


Black Rock Point and the Applegate-Lassen pioneer wagon trail historical marker


Upper High Dry Lakebed viewed from the island


the view west from the island on Upper High Dry Lakebed toward Lower High Dry and the west arm of the Black Rock Desert Playa (the flat part of Black Rock that most visitors know.)


I parked my truck at the edge of Upper High Dry lakebed pointing in the direction we were going hiking, in case anyone needed to find us.


The second hike of the morning was on the north side of Upper High Dry. The gray rocks on top of the cliff appear to overlie possible pre-impact rocks which we were looking for.


The first outcrop contains fractured rocks with white breccia dikes.


On top of the first outcrop


Upper High Dry Lakebed viewed from the first outcrop


At the second outcrop we found parallel sets of thinly-fractured rocks which appear to fracture in all directions about an axis pointing ESE and upward.


At the second outcrop we found parallel sets of thinly-fractured rocks which appear to fracture in all directions about an axis pointing ESE and upward.


At the second outcrop we found parallel sets of thinly-fractured rocks which appear to fracture in all directions about an axis pointing ESE and upward.


At the second outcrop we found parallel sets of thinly-fractured rocks which appear to fracture in all directions about an axis pointing ESE and upward.


At the second outcrop we found parallel sets of thinly-fractured rocks which appear to fracture in all directions about an axis pointing ESE and upward.


A set of gray rocks nearby had an identical fracturing pattern.


These vertical fracture lines on the back of Black Rock Point itself may be worth revisiting in this context on a future visit.