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The chain coral. This is an important index fossil of the Silurian, and an important limestone builder as well.

Chain Coral

The chain coral. This is an important index fossil of the Silurian, and an important limestone builder…

Favosites alcyonaria is a species of fossil corals from the Silurian, Devonian, and Carboniferous strata.

Fossil Coral

Favosites alcyonaria is a species of fossil corals from the Silurian, Devonian, and Carboniferous strata.

"Dalmanites limulurus, Green. One of the Phacopidae, from the Silurian, New York." — The Encyclopedia Britannica, 1910

Dalmanites

"Dalmanites limulurus, Green. One of the Phacopidae, from the Silurian, New York." — The Encyclopedia…

"Deiphon Forbesii, Barr. One of the Cheiruridae. Silurian Bohemia." — The Encyclopedia Britannica, 1910

Deiphon

"Deiphon Forbesii, Barr. One of the Cheiruridae. Silurian Bohemia." — The Encyclopedia Britannica,…

"Eurypterus Fischeri, Eichwald. Silurian of Rootzikil. Restoration after Schmidt. The dorsal aspect is presented showing the prosomatic shield with paired compound eyes and the prosomatic appendages II. to IV. The small first pair of appendages is concealed from view by the carapace. 1 to 12 are the somites of the opisthosoma; 13, the post-anal spine." — The Encyclopedia Britannica, 1910

Eurypterus Fischeri

"Eurypterus Fischeri, Eichwald. Silurian of Rootzikil. Restoration after Schmidt. The dorsal aspect…

"Ventral view of a restoration of Palaeophonus Hunteri, Pocock, the Silurian scorpion from Lesmahagow, Scotland. Restored by R. I. Peacock. The meeting of the coxae of all the prosomatic limbs in front of the pentagonal sternum; the space for a genital operculum; the pair of pectens, and the absence of any evidence of pulmonary stigmata are noticeable in this specimen." — The Encyclopedia Britannica, 1910

Palaeophonus Hunteri

"Ventral view of a restoration of Palaeophonus Hunteri, Pocock, the Silurian scorpion from Lesmahagow,…

"Dorsal view of a restoration of Palaeophonus nuncius, Thorell. The Silurian scorpion from Gothland." — The Encyclopedia Britannica, 1910

Palaophonus

"Dorsal view of a restoration of Palaeophonus nuncius, Thorell. The Silurian scorpion from Gothland."…

A section of the Paleozoic rocks found in the Mississppi basin illustrating the periods and ages.

Paleozoic Rocks

A section of the Paleozoic rocks found in the Mississppi basin illustrating the periods and ages.

"Pierygotus osiliensis, Schmidt. Silurian of Rootzkil. Restoration of the ventral surface, about a third natural size, after Schmidt. a, Camerostome or epistoma. m, Chilarium or metasternite of the prosoma. oc, The compound eyes. 1 to 8, segments of the sixth prosomatic appendage. I' to V', first five opisthosomatic somites. 7', sixth opisthosomatic somite." — The Encyclopedia Britannica, 1910

Pierygotus Osiliensis

"Pierygotus osiliensis, Schmidt. Silurian of Rootzkil. Restoration of the ventral surface, about a third…

Marks made by water spreading over shells of stones that are lodged in the sand, in this image in Silurian sandstone.

Rill Marks

Marks made by water spreading over shells of stones that are lodged in the sand, in this image in Silurian…