GoSF1: Introduction and overview
The first in a multi-part series on the geology of San Francisco and the surrounding area.
The first in a multi-part series on the geology of San Francisco and the surrounding area.
Sometimes you find folds in funny places, like the side of a monastery. Guest fold from Maitri.
Visit the “faultcano” in the Owens Valley of eastern California: a cinder cone which has been cut and offset along a normal fault associated with Basin & Range extension.
For the structural geology fans among AGU’s readership, enjoy the weekly installment of the Friday fold.
An animated image showing changing focus on a microscope camera aimed at a sample of S-C fabric is shared. Readers are encouraged to brainstorm uses for animated GIF images in the geosciences.
The author recounts a field trip in October along the section of Turkey’s North Anatolian Fault that last ruptured in 1944. The rock types on either side of the fault are compared, offset markers are illustrated, and several types of landforms particular to strike-slip faults are shown. The post concludes with an examination of the town of Gerede itself, which is built directly atop the fault.
Another look at Konnarock Formation diamictite, showing colorful reaction “halos” around some clasts.
A detailed description of one of the Virginia Blue Ridge’s most intriguing geologic formations: a maroon sedimentary sequence showing the advance of “Snowball Earth” glaciers in the Neoproterozoic.
The author describes a quick visit to the Virginia Museum of Natural History in Martinsville, Virginia, on his way back to DC from Thanksgiving travel. Highlights: a dinosaur, a giant stromatolite, encrusting crinoids (they do that?) and a giant ground sloth.
Part 6 of the Tavşanlı Zone field trip had us looking at some blueschists and eclogites. Today we conclude the terrific field trip with a brief look at a couple more stops.