Archive for March 9th, 2010

A most impressive volcano

March 9th, 2010

ZZYZX, CALIFORNIA–Our second and last stop of the day was Amboy Crater, which is about halfway between Barstow and Needles, California, near Route 66. Meagen Pollock, our ace petrologist, prepared us well for this visit, so we’ll wait for her to post the geological details and her expert observations. I want to prepare the ground with some photos of our hike up this remarkably recent cinder cone.

Wooster geologists walking across the lava field to Amboy Crater.

A very happy Meagen Pollock with a volcanic bomb tossed from Amboy Crater.

Wooster geologists on the rim of Amboy Crater trying very hard not to be blown down either the steep slope into the crater or the steeper slope down the outside.

Calico rocks

March 9th, 2010

ZZYZX, CALIFORNIA–The day started very cold with a stiff, persistent wind and low dark clouds moving quickly across the mountain north of Soda Lake. We are comfortable in our rooms and the dining hall, but tend to notice the cold in the shower building which is, shall we say, a tad breezy. Fortunately our first stop would be mostly in buildings and underground mines.

Calico is a reconstructed mining town east of Barstow.  It was founded in March 1881 and was soon the richest silver mining district in California. It began to decline with silver prices in 1907 and dwindled to a few shacks until Walter Knott renovated the buildings in 1951 and turned the site into a tourist attraction. Now it is a county park with numerous private businesses operated inside. We visited it today to see the old silver mines and mining techniques and to look at the mineralized Pickhandle and Barstow Formations which host the ores.

Calico Ghost Town from the scenic viewpoint to the north.

Megan Innis showing us excellent desiccation cracks (from drying mud) preserved in the Barstow Formation (Middle to Late Miocene) at Calico.

Rob Lydell, Adam Samale, Rob McConnell and Andrew Retzler relaxing outside a Calico business. Andrew is drinking, of course, a sarsaparilla.

Sure it is a bit windy out here, but look at these folds!

March 9th, 2010

Syncline in the Barstow Formation at Calico Ghost Town. Note that the ductile deformation at the base of the fold becomes brittle toward the top as the fold tightened. Shelley Judge is the one with the explaining hand.