Cincinnati epoch: alternatives and connections

The earliest period in geological period, extending up to the Lower Silurian. It includes an Azoic age, previous to the appearance of…

A genus of trilobites found in the Lower Silurian formation. See Illust. in Append.

A fish of the Ohio river; -- so called from the noise it makes.

A cant name for a native in Ohio.

Of or pertaining to the lowest subdivision of the rocks of the Silurian or Molluscan age; -- sometimes described as inferior to the Si…

The closing subdivision of the Devonian age in America. The rocks of this period are well developed in the Catskill mountains, and ext…

A genus of fossil corals, common in the lower Silurian limestones.

An epoch at the close of the Canadian period of the American Lower Silurian system; -- so named from a township in Clinton Co., New Yo…

A subdivision in the upper part of the Devonian system in America, so named from the Chemung River, along which the rocks are well dev…

A series of limestone strata found in Ohio and farther west, presenting bluffs along the rivers and valleys, formerly supposed to be o…

A genus of trilobites, of many species, common in the Upper Silurian and Devonian rocks.

A genus of large extinct Devonian ganoid fishes. In some parts of Ohio remains of the Dinichthys are abundant, indicating animals twen…

Formerly, the part of the United States east of the Alleghany Mountains, esp. the Eastern, or New England, States; now, commonly, the…

A fixed point of time, established in history by the occurrence of some grand or remarkable event; a point of time marked by an event…

Belonging to an epoch; of the nature of an epoch.

A genus of extinct Merostomata, found in Silurian rocks. Some of the species are more than three feet long.

A genus of fossil corals abundant in the Silurian and Devonian rocks, having polygonal cells with perforated walls.

To draw up or gather into close compass; to wrap or roll, as a sail, close to the yard, stay, or mast, or, as a flag, close to or arou…