Catskill period: alternatives and connections

A very high mountain. Specifically, in the plural, the highest chain of mountains in Europe, containing the lofty mountains of Switzer…

Of or pertaining to a chain of mountains in the United States, commonly called the Allegheny mountains.

A plant (Lewisia rediviva) allied to the purslane, but with fleshy, farinaceous roots, growing in the mountains of Idaho, Montana, etc…

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

A plume-shaped fossil, supposed to be a seaweed, characteristic of the lower Devonian rocks; as, the cauda galli grit.

A subdivision of the Quaternary age immediately following the Glacial period; -- so named from beds near Lake Champlain.

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…

An epoch at the close of the American lower Silurian system. The rocks are well developed near Cincinnati, Ohio. The group includes th…

To extend through the same space or time with another; to extend to the same degree.

A subdivision of the cretaceous formation of western North America, especially developed in Colorado and the upper Missouri region.

Of or pertaining to the lowest period of the Devonian age. (See the Diagram, under Geology.) The Corniferous period has been so called…

An Algonquin tribe of Indians, inhabiting a large part of British America east of the Rocky Mountains and south of Hudson's Bay.

any of several plants of or developed from the species Dahlia pinnata having tuberous roots and showy rayed variously colored flower h…

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

Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system.

To extend in length; to lengthen; to protract; to stretch; to extend, as a mass of metal into wire.

To enlarge; to widen; to carry out further; as, to extend the capacities, the sphere of usefulness, or commerce; to extend power or in…

A series of strata, of the Middle Tertiary period, of France, abounding in shells, and used by Lyell as the type of his Miocene subdiv…