Chert - Coyote Hills - a photo on Flickriver

Took a picture of this yellow colored rock on my walk in Coyote hills yesterday and discovered their long history ...

Nearly as plentiful as the greenstone, bright reddish-orange chert makes up most of the higher hills and pinnacled
outcrops of the Coyote Hills. Chert started its life as silica accumulating on the floors of deep ocean basins. Literally billions of tiny silica-shelled animals called radiolarians
lived, died, and sank to form a jelly-like ooze. Compressed for millennia, this ooze slowly turned into hard, brittle chert. Traces of iron and manganese give the chert its red, yellow, orange, blackish-blue, and green coloration. In many places, thin beds of manganese oxides remain between the chert
layers as thin, glossy bluish-black coatings.
Source: www.sfbayws.org/sites/default/files/tideline_fall_2016.pdf

Taken on: March 2, 2024

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Sets appears in: • EBRPD

Groups appears in: • Flickr Addicts • visit the world - the travel guide more » • California Local Parks (No National or State Parks!) • Landscape: The best Group on Flickr • World Photography - Public Photos - Traveling - Life • Northern California Photographers • California Landscapes and Desert • _The Best Of Nikon_ • California Currents • Backpacking and Hiking pictures • Nikon NIKKOR Z 24-70mm f/2.8 S - No 30/60 limit • Nikon Z6II Shooters « less

Camera: Nikon Z 6_2, f/8.0, 1/250 sec, 93mm, ISO 100 (more info) (hide info)

Camera:	Nikon Z 6_2
Lens:	NIKKOR Z 70-200mm f/2.8 VR S
Aperture:	f/8.0
Exposure Time:	0.004 sec (1/250)
Focal Length:	93mm
ISO:	100
Exposure Bias:	0 EV
Flash:	No Flash
Exposure Program:	Aperture-priority AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Manual
Scene Capture Type:	Landscape
Sharpness:	Hard
Color Space:	Uncalibrated
Software:	Capture One Windows
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