Assertion: eurypterid | /r/AtLocation | great abundance
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: The eurypterids (Arthropoda: Chelicerata), some of the earliest arthropods to undertake amphibious excursions onto land, are generally rare in the fossil record, but are sometimes found in great abundance, for example in the Late Silurian Bertie Group of New York State.