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Geobulletin
alpha
News from the Geoblogosphere
by Stratigraphy.net
New from Snet:
Lithologs
, a new tool to create lithological/sedimentological logs online..
Blog post recommendation
CHELICERATES: EURYPTERIDS, SPIDERS AND HORSESHOE CRABS
Sanctacaris uncata, (Briggs & Collins, 1988)Chelicerates first emerged in our ancient oceans some 508 million years ago, as the arthropod Sanctacaris uncata (Briggs & Collins, 1988) known from the Glossopleura Zone, Stephen Formation of Mount Stephen in the Canadian Rockies of British Columbia, Canada. Sanctacaris is proof positive that chelicerates, although rare, were present in our Middle
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