I dedicate my answers to my departed mother and father, who took me places and showed me things that fostered my interest in science, my daughter that reconnected me to the joy of discovery, and my wife who encourages me to indulge my interest.


Need help identifying a rock or mineral?
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Geologic Points of Some Interest:

Jones1rocks, Jones2rocks, and Jones3rocks at Shoshone Point, Grand Canyon

Uneroded Triassic remnant, Cedar Mountain, from Navajo Point, Grand Canyon

For the fan of sedimentary geology, this picture has it all: scree, talus, strata, erosion, mechanical weathering, cross bedding. Demonstrates a very clear demarcation between the Coconino Sandstone and the Hermit Shale layers. Located along the upper Bright Angel Trail, Grand Canyon, Arizona.

Jones3rocks traverses the rim of 50,000 year old Barringer Meteor Crater, near Winslow, Arizona

San Onofre Breccia, Dana Point, California. A jumbled mix of very interesting cemented rock fragments, along with the two temporarily and dangerously emplaced non-rock rockhounds, Evan and Colin.

Nearly pure orthoquartzite Ordivician sandstone overhang, Starved Rock State Park, Utica, Illinois

Lower Devonian age Clear Creek Chert (tripoli) Birk-McCrite Quarry, Tamms, IL