|
Warsaw Formation
The Warsaw Formation is a geologic formation in Illinois, Iowa and Missouri. It preserves fossils dating back to the Mississippian subperiod. See also * List of fossiliferous stratigraphic units in Illinois * List of fossiliferous stratigraphic units in Iowa * List of fossiliferous stratigraphic units in Missouri This article contains a list of fossil-bearing stratigraphic units in the state of Missouri, U.S. Sites See also * Paleontology in Missouri References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Missouri Missouri Stratigraphi ... References * Carboniferous Illinois Carboniferous Iowa Mississippian Missouri Carboniferous southern paleotropical deposits {{US-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geode
A geode (; ) is a geological secondary formation within sedimentary and volcanic rocks. Geodes are hollow, vaguely spherical rocks, in which masses of mineral matter (which may include crystals) are secluded. The crystals are formed by the filling of vesicles in volcanic and subvolcanic rocks by minerals deposited from hydrothermal fluids; or by the dissolution of syn-genetic concretions and partial filling by the same or other minerals precipitated from water, groundwater, or hydrothermal fluids. Formation Geodes can form in any cavity, but the term is usually reserved for more or less rounded formations in igneous and sedimentary rocks. They can form in gas bubbles in igneous rocks, such as vesicles in basaltic lava; or, as in the American Midwest, in rounded cavities in sedimentary formations. After rock around the cavity hardens, dissolved silicates and/or carbonates are deposited on the inside surface. Over time, this slow feed of mineral constituents from groundwater o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (geology)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous Iowa
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin '' carbō'' ("coal") and '' ferō'' ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern 'system' names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. The Carboniferous is often treated in North America as two geological periods, the earlier Mississippian and the later Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Tetrapods (four limbed vertebrates), which had originated from lobe-finned fish during the preceding Devonian, became pentadactylous in and diversified during the Carboniferous, including early amphibian lineages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous Illinois
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin '' carbō'' ("coal") and '' ferō'' ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern 'system' names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. The Carboniferous is often treated in North America as two geological periods, the earlier Mississippian and the later Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Tetrapods (four limbed vertebrates), which had originated from lobe-finned fish during the preceding Devonian, became pentadactylous in and diversified during the Carboniferous, including early amphibian lineages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Missouri
This article contains a list of fossil-bearing stratigraphic units in the state of Missouri, U.S. Sites See also * Paleontology in Missouri References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Missouri Missouri Stratigraphic units A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic, lithologic or paleontologic features (facies) that characterize ... Stratigraphy of Missouri Missouri geography-related lists United States geology-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Iowa
This article contains a list of fossil-bearing stratigraphic units in the state of Iowa, U.S. Sites See also * Paleontology in Iowa References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Iowa Iowa Stratigraphic units A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic, lithologic or paleontologic features (facies) that characterize ... Stratigraphy of Iowa Iowa geography-related lists United States geology-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Illinois
This article contains a list of fossil-bearing stratigraphic units in the state of Illinois, U.S. Sites See also * Paleontology in Illinois References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Illinois Illinois Stratigraphic units A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic, lithologic or paleontologic features (facies) that characterize ... Stratigraphy of Illinois Illinois geography-related lists United States geology-related lists ... [...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] |
Keokuk Limestone
The Keokuk Limestone is a geologic formation in Illinois, Iowa and Missouri Missouri is a state in the Midwestern region of the United States. Ranking 21st in land area, it is bordered by eight states (tied for the most with Tennessee): Iowa to the north, Illinois, Kentucky and Tennessee to the east, Arkansas t .... It preserves fossils dating back to the Mississippian sub-period. See also * List of fossiliferous stratigraphic units in Illinois * List of fossiliferous stratigraphic units in Iowa * List of fossiliferous stratigraphic units in Missouri References * Carboniferous Illinois Carboniferous Iowa Carboniferous Missouri Carboniferous southern paleotropical deposits {{US-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warsaw, Illinois
Warsaw is a city in Hancock County, Illinois, United States. The population was 1,607 at the 2010 census, a decline from 1,793 in 2000. The city is notable for its historic downtown and the Warsaw Brewery, which operated for more than 100 years beginning in 1861 and, after renovation, reopened as a bar, restaurant and microbrewery in 2006. History The city of Warsaw began in 1812, when young Major Zachary Taylor founded Fort Edwards on the eastern bank of the Mississippi River across from the mouth of the Des Moines River. Fort Johnson was occupied only for a few weeks before it was burned. In 1815 another military camp, Fort Edwards, was built nearby at a different location. Warsaw became an important fur trading post and one of the earliest American settlements in northern Illinois. During the 1840s, Warsaw was a center of opposition to Mormon settlement in Nauvoo and other areas in Hancock County during the conflict sometimes known as the " Mormon Illinois War". The local ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salem Formation
The Salem Formation is a geologic formation in Illinois, Indiana, Kentucky, and Missouri. It preserves fossils dating back to the Mississippian subperiod. See also * List of fossiliferous stratigraphic units in Illinois * List of fossiliferous stratigraphic units in Indiana * List of fossiliferous stratigraphic units in Kentucky * List of fossiliferous stratigraphic units in Missouri This article contains a list of fossil-bearing stratigraphic units in the state of Missouri, U.S. Sites See also * Paleontology in Missouri References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Missouri Missouri Stratigraphi ... References * Mississippian Illinois Geologic formations of Indiana Geologic formations of Missouri Carboniferous Kentucky Carboniferous southern paleotropical deposits {{US-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
