Sentences with phrase «calcite structures»
The researchers hope to get a rough age range for the fossils by dating flowstones — calcite structures formed slowly by dripping water — in adjacent rock layers.
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Unlike typical crystal structures like shells, which incorporate thousands of smaller, geometrically symmetrical crystals attached to each other, each spine on a sea urchin is a single large calcite crystal with its own convoluted shape.
Calcite crystals are also formed such that different facets have mirror - image atomic - scale structures.
coccoliths: Microscopic structures of varying shape and size that are made of calcite, are secreted by calcareous nannoplankton, and are found in marine deposits from the Triassic period to the Recent.
The structure was built using Chateau - Landon, a type of travertine stone which reacts with water to secrete calcite, which in effect bleaches the stone and keeps the building a bright, white colour.