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“Oreodont: Ancient Grazer of the Badlands (U
Experimental detection of α-particles from the radioactive decay of natural bismuth
They make fantastic gifts and display pieces
CRINOID (170
Polished Ammonite Split Pair - 3.154" Cleoniceras brazil “Oreodont: Ancient Grazer of theAmmonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 3. 154" polished Cleoniceras fossil from Madagascar. The fossil has been split into a paired set to showcase the beautiful internal chambers of the shell. These internal chambers are called septa and the ammonite could fill them with air in order to float through the ocean like a balloon. After millions of years, they are now
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