Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of silurian is as below...

Chazy Epoch :: Chazy epoch () An epoch at the close of the Canadian period of the American Lower Silurian system; -- so named from a township in Clinton Co., New York. See the Diagram under Geology..

Eophyte :: Eophyte (n.) A fossil plant which is found in the lowest beds of the Silurian age.

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

Calymene :: Calymene (n.) A genus of trilobites characteristic of the Silurian age.

Oriskany :: Oriskany (a.) Designating, or pertaining to, certain beds, chiefly limestone, characteristic of the latest period of the Silurian age..

Chaetetes :: Chaetetes (n.) A genus of fossil corals, common in the lower Silurian limestones..

Quebec Group :: Quebec group () The middle of the three groups into which the rocks of the Canadian period have been divided in the American Lower Silurian system. See the Chart of Geology.

Utica :: Utica (a.) Of, pertaining to, or designating, a subdivision of the Trenton Period of the Lower Silurian, characterized in the State of New York by beds of shale..

Atrypa :: Atrypa (n.) A extinct genus of Branchiopoda, very common in Silurian limestones..

Trinucleus :: Trinucleus (n.) A genus of Lower Silurian trilobites in which the glabella and cheeks form three rounded elevations on the head.

Dalmania :: Dalmania (n.) A genus of trilobites, of many species, common in the Upper Silurian and Devonian rocks..

Llandeilo Group :: Llandeilo group () A series of strata in the lower Silurian formations of Great Britain; -- so named from Llandeilo in Southern Wales. See Chart of Geology.

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

Niagara Period :: Niagara period () A subdivision or the American Upper Silurian system, embracing the Medina, Clinton, and Niagara epoch. The rocks of the Niagara epoch, mostly limestones, are extensively distributed, and at Niagara Falls consist of about eighty feet of shale supporting a greater thickness of limestone, which is gradually undermined by the removal of the shale. See Chart of Geology..

Nidulite :: Nidulite (n.) A Silurian fossil, formerly supposed to consist of eggs..

Delthyris :: Delthyris (n.) A name formerly given to certain Silurian brachiopod shells of the genus Spirifer.

Wenlock Group :: Wenlock group () The middle subdivision of the Upper Silurian in Great Britain; -- so named from the typical locality in Shropshire.

Phacops :: Phacops (n.) A genus of trilobites found in the Silurian and Devonian formations. Phacops bufo is one of the most common species.

Ludlow Group :: Ludlow group () A subdivision of the British Upper Silurian lying below the Old Red Sandstone; -- so named from the Ludlow, in Western England. See the Chart of Geology..

Taconic :: Taconic (a.) Designating, or pertaining to, the series of rocks forming the Taconic mountains in Western New England. They were once supposed to be older than the Cambrian, but later proved to belong to the Lower Silurian and Cambrian..

Random Fonts

Most Popular