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Dracopristis
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Dracopristis is an extinct genus of ctenacanth that lived during the Carboniferous period in North America, around 307 million years ago. The species was discovered in the Kinney Brick Quarry in New M
Dracopristis
An exposure of limestone belonging to the Atrasado Formation, photographed along a roadcut near Jemez Springs, New Mexico
An exposure of limestone belonging to the Atrasado Formation, photographed along a roadcut near Jemez Springs, New Mexico
Large, ornamented dorsal spines of ctenacanths, such as Ctenacanthus (pictured) and Dracopristis, are a defining feature of the group
Large, ornamented dorsal spines of ctenacanths, such as Ctenacanthus (pictured) and Dracopristis, are a defining feature of the group
The articulated remains of a large symmoriiform similar to Cobelodus, discovered at the Kinney Brick Quarry
The articulated remains of a large symmoriiform similar to Cobelodus, discovered at the Kinney Brick Quarry
Carboniferous
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The Carboniferous is a geologic period and system of the Paleozoic era that spans 60 million years, from the end of the Devonian Period 358.86 Ma to the beginning of the Permian Period, 298.9 Ma. It i
Cliff section through the Serpukhovian Red Wharf Limestone Formation, Wales. A marine limestone at the base of the cliff is overlain by an orange-colo
Cliff section through the Serpukhovian Red Wharf Limestone Formation, Wales. A marine limestone at the base of the cliff is overlain by an orange-coloured fluvial sandstone. Subaerial exposure of the limestone during a period of falling sea level resulted in the formation of a karstic surface, which has then been infilled by the river sands. A thin, estuarine silty mudstone overlays the sandstone, which in turn is overlain by a second marine limestone.
Hyden Formation over Pikeville Formation in the Pennsylvanian of Kentucky, US. The exposure has Pennsylvanian-aged cyclothemic sedimentary rocks of th
Hyden Formation over Pikeville Formation in the Pennsylvanian of Kentucky, US. The exposure has Pennsylvanian-aged cyclothemic sedimentary rocks of the Breathitt Group. The upper part of the roadcut is Hyden Formation, consisting of mixed siliciclastics and coal. The lower part is Pikeville Formation, also having mixed siliciclastics and coal.
Etching depicting some of the most significant plants of the Carboniferous
Etching depicting some of the most significant plants of the Carboniferous
Ancient in situ lycopsid, probably Sigillaria, with attached stigmarian roots, Joggins Formation, Canada
Ancient in situ lycopsid, probably Sigillaria, with attached stigmarian roots, Joggins Formation, Canada