fossil spongesの例文

例文

1. ""'Brooksella alternata " "'is a species of lobate Cambrian fossil sponge found in the Conasauga Formation of Alabama and Georgia.
2. To make his work as trustworthy as possible Dr Zittel made special studies of each great group, commencing with the fossil sponges, on which he published a monograph ( 1877 79 ).
3. Critical examinations of these reported fossils have concluded that the fossil sponges are inorganic silica concretions; the jellyfish are either gas escape structures or algal colonies; and the worm trails are inorganic sedimentary structures.