Assertion: eurypterid | /r/HasProperty | vast service
Facets:
value: in helping to locate palaeozoic rivers
type: TEMPORAL
Source sentences:
text: This applies with as great truth to the Palaeozoic as to the Tertiary, and while the aid of plants cannot there be invoked until the end of the period, I hope to show before concluding this paper that the eurypterids will be of vast service in helping to locate Palaeozoic rivers and routes of migration from one continent to another.