List Of Fossiliferous Stratigraphic Units In Alaska

	List Of Fossiliferous Stratigraphic Units In Alaska This article contains a list of fossil-bearing stratigraphic units in the state of Alaska, U.S. Sites See also * Paleontology in Alaska References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Alaska Stratigraphic Units Alaska Stratigraphic Units A stratigraphic unit is a volume of Rock (geology), rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrology, petrographic, lithology, lithologic or paleontology, p ... Stratigraphy of Alaska United States geology-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Stratigraphic Units A stratigraphic unit is a volume of Rock (geology), rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrology, petrographic, lithology, lithologic or paleontology, paleontologic features (facies) that characterize it. Units must be ''mappable'' and ''distinct'' from one another, but the contact need not be particularly distinct. For instance, a unit may be defined by terms such as "when the sandstone component exceeds 75%". Lithostratigraphic units Sequences of sedimentary rock, sedimentary and volcanic rocks are subdivided the basis of their shared or associated lithology. Formally identified lithostratigraphic units are structured in a hierarchy of lithostratigraphic rank, higher rank units generally comprising two or more units of lower rank. Going from smaller to larger in rank, the main lithostratigraphic ranks are Bed, Member, Formation, Group and Supergroup. Formal names of lithostratigraph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Buchia Ridge Formation The Buchia Ridge Formation is a geologic formation in Alaska. It preserves fossils dating back to the Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Cretaceous Alaska {{Cretaceous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Colville Group The Colville Group is a geologic group in Alaska. It preserves fossils dating back to the Paleogene The Paleogene ( ; British English, also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period, geologic period and system that spans 43 million years from the end of the Cretaceous Period million yea ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Geologic groups of Alaska Paleogene stratigraphic units of North America {{Paleogene-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Chitistone Formation The Chitistone Formation is a geologic formation in Alaska. It preserves fossils dating back to the Triassic The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Triassic Alaska {{Triassic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Chisana Formation The Chisana Formation is a geologic formation in Alaska. It preserves fossils dating back to the Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Cretaceous Alaska {{Cretaceous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Chinitna Formation The Chinitna Formation is a geologic formation in Alaska. It preserves fossils dating back to the Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Jurassic Alaska Jurassic System of North America Bathonian Stage {{Jurassic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Chignik Formation The Chignik Formation is a geologic formation in Alaska. It preserves fossils dating back to the Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Cretaceous Alaska {{Cretaceous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Chickaloon Formation The Chickaloon Formation is a geologic formation in Alaska. It preserves fossils dating back to the Paleogene The Paleogene ( ; British English, also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period, geologic period and system that spans 43 million years from the end of the Cretaceous Period million yea ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska Paleogene Alaska Thanetian Stage {{Paleogene-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Cheeneetnuk Formation The Cheeneetnuk Formation is a geologic formation in Alaska. It preserves fossils dating back to the Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, whe ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Devonian Alaska Devonian northern paleotropical deposits {{Devonian-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Triassic The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic Era. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic. The Triassic began in the wake of the Permian–Triassic extinction event, which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in the Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles, especially archosaurs, were the chief terrestrial vertebrates during this time. A specialized subgroup of archo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Chapin Peak Formation The Chapin Peak Formation is a geologic formation in Alaska. It preserves fossils dating back to the Triassic The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Triassic Alaska {{Triassic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Cascaden Ridge Formation The Cascaden Ridge Formation is a geologic formation in Alaska. It preserves fossils dating back to the Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, whe ... period. See also * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska References * Devonian Alaska Devonian southern paleotropical deposits {{Devonian-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]