54.8 MB (2.9 MB compressed)
4924 x 3888 pixels
41.7 x 33.0 cm ⏐ 16.4 x 13.0 in (300dpi)
SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Gogotte, fossilised sandstone concretion. 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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