57.7 MB (7.2 MB compressed)
5184 x 3888 pixels
43.9 x 33.0 cm ⏐ 17.3 x 13.0 in (300dpi)
SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Gogotte fossilised sandstone concretion, close-up. This rock formation is a sandstone concretion bonded by a siliceous cement. The sand grains have been glued together by silica rich water circulating within the sand layer. This specimen is 30,000-50,000 years old.
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