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Sonyea Group
The Sonyea Group is a geologic group in the northern part of the Appalachian Basin. It preserves fossils dating back to the Devonian period. In the western part, it is divided into the Cashaqua Shale at the top, and the Middlesex Shale at the bottom. In the east, various shale formations are included between the Cashaqua and Middlesex members, including Rye Point Shale, Rock Stream Formation (" Enfield Formation") Siltstone, Pulteney shale, Sawmill Creek Shale, Johns Creek Shale and Montour Shale. See also * List of fossiliferous stratigraphic units in Pennsylvania * Paleontology in Pennsylvania image:Map of USA PA.svg, The location of Pennsylvania Paleontology in Pennsylvania refers to paleontological research occurring within or conducted by people from the U.S. state of Pennsylvania. The geologic column of Pennsylvania spans from the Pr ... References * * Geologic groups of Pennsylvania Devonian geology of New York (state) {{Pennsylvania-geologic-formati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Group (stratigraphy)
In geology, a group is a lithostratigraphic unit consisting of a series of related formations that have been classified together to form a group. Formations are the fundamental unit of stratigraphy. Groups may sometimes be combined into supergroups. Groups are useful for showing relationships between formations, and they are also useful for small-scale mapping or for studying the stratigraphy of large regions. Geologists exploring a new area have sometimes defined groups when they believe the strata within the groups can be divided into formations during subsequent investigations of the area. It is possible for only some of the strata making up a group to be divided into formations. An example of a group is the Glen Canyon Group, which includes (in ascending order) the Wingate Sandstone, the Moenave Formation, the Kayenta Formation, and the Navajo Sandstone. Each of the formations can be distinguished from its neighbor by its lithology, but all were deposited in the same vast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. The arthropod groups of myriapods, arachnids and hexapods also became well-established early in this period, after starting their expansion to land at least from the Ordovician period. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the Age of Fishes. The placoderms began dominating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleontology In Pennsylvania
The location of Pennsylvania Paleontology in Pennsylvania refers to paleontological research occurring within or conducted by people from the U.S. state of Pennsylvania. The geologic column of Pennsylvania spans from the Precambrian to Quaternary. During the early part of the Paleozoic, Pennsylvania was submerged by a warm, shallow sea. This sea would come to be inhabited by creatures like brachiopods, bryozoans, crinoids, graptolites, and trilobites. The armored fish '' Palaeaspis'' appeared during the Silurian. By the Devonian the state was home to other kinds of fishes. On land, some of the world's oldest tetrapods left behind footprints that would later fossilize. Some of Pennsylvania's most important fossil finds were made in the state's Devonian rocks. Carboniferous Pennsylvania was a swampy environment covered by a wide variety of plants. The latter half of the period was called the Pennsylvanian in honor of the state's rich contemporary rock record. By the end of the Paleo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Pennsylvania
This article contains a list of fossil-bearing stratigraphic units in the state of Pennsylvania, U.S. Sites See also * Paleontology in Pennsylvania References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Pennsylvania Pennsylvania 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 Pennsylvania Pennsylvania geography-related lists United States geology-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulteney Shale
The Pulteney Shale is a geologic formation in New York. It preserves fossils dating back to the Devonian period. See also * List of fossiliferous stratigraphic units in New York This article contains a list of fossil-bearing stratigraphic units in the state of New York, U.S. Sites See also * Paleontology in New York References * {{DEFAULTSORT:Fossiliferous stratigraphic units in New York New York Stratigraph ... References * * * * * Devonian geology of New York (state) {{NewYork-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enfield Formation
The Enfield Formation is a Formation (stratigraphy), geologic formation in New York (state), New York. It preserves fossils dating back to the Devonian Period (geology), period. See also * List of fossiliferous stratigraphic units in New York References * * * Devonian geology of New York (state) Devonian southern paleotemperate deposits {{NewYork-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rock Stream Formation
The Rock Stream Formation (or Rock Stream siltstone) is a geologic formation in New York. It preserves fossils dating back to the Devonian period. See also * List of fossiliferous stratigraphic units in New York This article contains a list of fossil-bearing stratigraphic units in the state of New York, U.S. Sites See also * Paleontology in New York References * {{DEFAULTSORT:Fossiliferous stratigraphic units in New York New York Stratigraph ... References * * * * Devonian geology of New York (state) Devonian southern paleotemperate deposits Frasnian Stage {{NewYork-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middlesex Shale
The Middlesex Formation is a carbon rich black shale geologic formation found in the Appalachian Basin. It represents one of several transgressive events (rising sea levels) during the Late Devonian. Description The Middlesex is a laminated dark grey to black mudstones and siltstone. It developed in an Anoxic environment. Further evidence of this is the lack of bioturbation Bioturbation is defined as the reworking of soils and sediments by animals or plants. It includes burrowing, ingestion, and defecation of sediment grains. Bioturbating activities have a profound effect on the environment and are thought to be a pr .... There are also sparse sand and silt layers suggesting that they were single event deposits. References * * * * Devonian geology of New York (state) Devonian Pennsylvania {{NewYork-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cashaqua Shale
The Cashaqua Shale is a geologic formation in New York. It preserves fossils dating back to the Devonian period. The Cashaqua shale underlies the Rhinestreet Shale member of the West Falls Group, and overlies various other members of the Sonyea Group. In the western part of New York State, it overlies the Middlesex Shale, and moving eastward, it overlies the Pulteney shale and then the Rock Stream Formation The Rock Stream Formation (or Rock Stream siltstone) is a geologic formation in New York. It preserves fossils dating back to the Devonian period. See also * List of fossiliferous stratigraphic units in New York This article contains a list of ... in west-central New York. References * * * * * * Devonian geology of New York (state) Devonian Pennsylvania {{NewYork-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York State Museum
The New York State Museum is a research-backed institution in Albany, New York, United States. It is located on Madison Avenue, attached to the south side of the Empire State Plaza, facing onto the plaza and towards the New York State Capitol. The museum houses art, artifacts (prehistoric and historic), and ecofacts that reflect New York’s cultural, natural, and geological development. Operated by the New York State Education Department's Office of Cultural Education, it is the oldest and largest state museum in the US. Formerly located in the State Education Building, the museum now occupies the first four floors of the Cultural Education Center, a ten-story, building that also houses the New York State Archives and New York State Library. In 2020, the COVID-19 pandemic forced the NYSM, State Archives, and State Library to close temporarily, with museum employees continuing to work behind the scenes, offering virtual programming and online exhibitions. The Museum reope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Period (geology)
The geologic time scale, or geological time scale, (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (scientific branch of geology that aims to determine the age of rocks). It is used primarily by Earth scientists (including geologists, paleontologists, geophysicists, geochemists, and paleoclimatologists) to describe the timing and relationships of events in geologic history. The time scale has been developed through the study of rock layers and the observation of their relationships and identifying features such as lithologies, paleomagnetic properties, and fossils. The definition of standardized international units of geologic time is the responsibility of the International Commission on Stratigraphy (ICS), a constituent body of the International Union of Geological Sciences (IUGS), whose primary objective is to precisely define ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absolute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
