tabulate corals造句
例句與造句
- Sea levels rose in the Devonian, and tabulate corals became much less common.
- Rugose and tabulate corals became extinct.
- The exposure is unique large and diverse tabulate corals and rugose corals are exposed in lifelike positions.
- These tabulate corals lived from Ordovician to Silurian ( from 449.5 to 412.3 Ma ).
- These tabulate corals lived from Ordovician to Devonian ( from 471.8 to 412.3 Ma ).
- It's difficult to find tabulate corals in a sentence. 用tabulate corals造句挺難的
- With Stromatoporoidea and rugose corals, the tabulate corals are characteristic of the shallow waters of the Silurian and Devonian.
- These tabulate corals lived from the Ordovician to the Permian period ( from 449.5 to 279.5 Ma ).
- Later, during the Silurian period, Missouri was home to abundant lacy bryozoans, conodonts, tabulate corals, tetracorals, abundant crinoids, trilobites.
- The "'tabulate corals "', forming the rugose corals, but vary considerably in shape, from flat to conical to spherical.
- Tabulate corals occur in limestones and calcareous shales of the Ordovician and Silurian periods, and often form low cushions or branching masses of calcite alongside rugose corals.
- Although corals first appeared in the Cambrian period, some, fossils are extremely rare until the Ordovician period, 100 million years later, when rugose and tabulate corals became widespread.
- The documented phosphatized microfossils of algae, multicellular thallophytes ( seaweeds ), acritarchs, ciliates, and cyanophytes, besides adult sponges and adult cnidarians ( coelenterates; these may be early forms of tabulate corals ( tetracorallians ) ).
- Into the Devonian, there were a small number of ammonoids, conodonts, tabulate corals, tetracorals, abundant crinoids, a moderate number of nautloids ( with both straight and coiled shells ), abundant pelecypods, abundant stromatoporoids, and trilobites.
- During the Mississippian, Missouri was home to fairly abundant ammonoids, abundant " Archimedes " screws, very abundant blastoids, abundant lacy bryozoans, tabulate corals, tetracorals, endothyroid foraminferans, a moderate number of nautiloids, fairly abundant pelecypods, fairly abundant trilobites, abundant worms.