Rainbow Rock

Uploaded: March 19, 2010 21:29:46

Description

Rainbow Rock is considered geologically significant and is located at the southern end of the Samuel Boardman State Park on the southern Oregon coast. It displays radiolarian and diatom compaction in chert and sedimentary rock. Radiolarians are amoeba-like protozoa whose mineral skeletal remains cover large portions of the sea floor, mostly near the equator. Diatoms are a form of algae encased with a unique form of silica. They both date as far back as the Cambrian period (500 million years ago). If you look closely you can see how the rocks layers have several small anticlines (upward curved folds) and synclines (downward u-shaped folds). There may also be evidence of faulting within the rock, and probably also caused the rock to be exposed as it is today. It is quite unusual to have so many different geological features within a single rock.

Exif: F Number: 10, ExposureTime: 100/31999 seconds, ISO: 200, FocalLength: 80.00 mm, Model: NIKON D700

Comments

Ann H. Belus level-deluxe March 19, 2010

This is an awesome scene, very artfully captured, Randall! Love the color variations and layers in the rocks; and your scientific description is sooo interesting! Thanks so much for sharing this information. I am also in Oregon this month and enjoying shooting the beautiful coastline. #1250117

Kathy Salerni level-classic March 19, 2010

What a beautiful coastal image, Randall!
Your paragraph describing the Rock was so very informative! Just a perfect shot! #8467236

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