Assertion: eurypterid | /r/CapableOf | change through several geologic periods
Facets:
value: here again
type: TEMPORAL
Source sentences:
text: Here again, as in the fauna of the Normanskill and Schenectady beds, the eurypterids may have changed but very little through several geologic periods; and in all these cases cited, the Shawangunk grit, the Schenectady beds and the Normanskill beds at Kingston, there is identity in lithologic characters and indications of similar littoral conditions, of narrow gulf, or delta, or estuary.