Paleozoic seas

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• Paleozoic — era 542   251 million years ago Key events in the Paleozoic view • edit …   Wikipedia

• Paleozoic Era — or Palaeozoic Era Major interval of geologic time, с 543–248 million years ago. From the Greek for ancient life, it is the first era of the Phanerozoic Eon and is followed by the Mesozoic Era. It is divided into six periods: (from oldest to… …   Universalium

• The Ozarks — Ozark redirects here. For other uses, see Ozark (disambiguation). Ozark Mountain redirects here. For the wine region, see Ozark Mountain AVA. The Ozarks, Ouachitas, Black Hills, and Sawtooths …   Wikipedia

• Trace fossil — Chirotherium footprints in a Triassic sandstone …   Wikipedia

• arthropod — /ahr threuh pod /, n. 1. any invertebrate of the phylum Arthropoda, having a segmented body, jointed limbs, and usually a chitinous shell that undergoes moltings, including the insects, spiders and other arachnids, crustaceans, and myriapods. adj …   Universalium

• Barn Bluff (Red Wing, Minnesota) — Infobox nrhp name = Barn Bluff nrhp type = caption = Looking south from the top of Barn Bluff, April 2006 location = Red Wing, Minnesota locmapin = Minnesota area = added = August 3, 1990 governing body = Local refnum = 90001165 cite web|url=http …   Wikipedia

• Charles Schuchert — (* 3. Juli 1858 in Cincinnati, Ohio; † 20. November 1942 in New Haven, Connecticut) war ein US amerikanischer Paläontologe, der führend an der Entwicklung der Paläogeographie mitwirkte, dem Studium der Verteilung von Land und Meer in der… …   Deutsch Wikipedia

• Schuchert — Charles Schuchert (* 3. Juli 1858 in Cincinnati, Ohio; † 20. November 1942 in New Haven, Connecticut) war ein US amerikanischer Paläontologe, der führend an der Entwicklung der Paläogeographie mitwirkte, dem Studium der Verteilung von Land und… …   Deutsch Wikipedia

• Saint Francois Mountains — The Saint Francois Mountains, a range located in southeast Missouri, is an outcrop of Precambrian igneous rock mountains rising over the Ozark Plateau. This range is one of the oldest exposures of igneous rock in North America. The range is often …   Wikipedia

• Pterygotus — Taxobox name = Pterygotus fossil range = Silurian Devonian regnum = Animalia phylum = Arthropoda subphylum = Chelicerata classis = Eurypterida dagger; superfamilia = Pterygotoidea familia = Pterygotidae genus = Pterygotus type species =… …   Wikipedia

• Northern Highland — The Northern Highland is a geographical region covering much of the northern territory of the U.S. state of Wisconsin. The region stretches from the state border with Minnesota in the west to the Michigan border in the east, and from Douglas and… …   Wikipedia