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Torreya Formation
The Torreya Formation is a Miocene geologic formation with an outcrop in North Florida. It is within the Hawthorn Group. Age Period: Neogene Epoch: Early Miocene Faunal stage: Aquitanian through early Messinian ~19–15.3 mya, calculates to a period of Composition The Torreya Formation is exposed or near the surface from Gadsden County, Florida on the west. Its eastern extent is westernmost Hamilton County, Florida. It includes the counties of Liberty, Leon, Jefferson, Madison, and Wakulla. It is informally subdivided into a lower carbonate unit and an upper siliciclastic unit. The majority of Torreya Formation outcrops expose the siliciclastic part of the unit. Lithology The siliciclastics are quartz and vary in color from white to light olive gray. They are unconsolidated to poorly indurated (hard), slightly clayey sands with minor phosphate to light gray to bluish gray, poorly consolidated, variably silty clay (Dogtown Member). The siliciclastics are sporadically fossil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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] |
Hamilton County, Florida
Hamilton County is a county located in the north central portion of the U.S. state of Florida. As of the 2020 census, the population was 14,004, down from 14,799 at the 2010 census. Its county seat is Jasper. History Hamilton County was created in 1827 from portions of Jefferson County. It was named for Alexander Hamilton, first United States Secretary of the Treasury. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (1.0%) is water. It is the only county in Florida entirely north of Interstate 10. Adjacent counties * Echols County, Georgia - north * Columbia County - east * Suwannee County - south * Madison County - west * Lowndes County, Georgia - northwest Major Highway * Interstate 75 * U.S. Route 41 * U.S. Route 129 * State Road 6 * State Road 100 * State Road 136 * State Road 143 Politics Voter Registration According to the Secretary of State's Office, as of September 30, 2022 Republicans hold a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mudstone
Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds. Mudstone is distinguished from '' shale'' by its lack of fissility (parallel layering).Blatt, H., and R.J. Tracy, 1996, ''Petrology.'' New York, New York, W. H. Freeman, 2nd ed, 529 pp. The term ''mudstone'' is also used to describe carbonate rocks (limestone or dolomite) that are composed predominantly of carbonate mud. However, in most contexts, the term refers to siliciclastic mudstone, composed mostly of silicate minerals. The NASA Curiosity rover has found deposits of mudstone on Mars that contain organic substances such as propane, benzene and toluene. Definition There is not a single definition of mudstone that has gained general acceptance,Boggs 2006, p.143 though there is wide agreement that mudstones are fine-grained sedimentary rocks, composed mostly of silicate grains with a grain size less than . Individual grains this size are too small to be disting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphate
In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid . The phosphate or orthophosphate ion is derived from phosphoric acid by the removal of three protons . Removal of one or two protons gives the dihydrogen phosphate ion and the hydrogen phosphate ion ion, respectively. These names are also used for salts of those anions, such as ammonium dihydrogen phosphate and trisodium phosphate. File:3-phosphoric-acid-3D-balls.png, Phosphoricacid File:2-dihydrogenphosphate-3D-balls.png, Dihydrogenphosphate File:1-hydrogenphosphate-3D-balls.png, Hydrogenphosphate File:0-phosphate-3D-balls.png, Phosphate In organic chemistry, phosphate or orthophosphate is an organophosphate, an ester of orthophosphoric acid of the form where one or more hydrogen atoms are replaced by organic groups. An example is trimethyl phosphate, . The term also refers to the triv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seaboard Air Line Railroad Site
The Leon County paleontological sites are assemblages of Early Miocene invertebrates and vertebrates of Leon County, Florida, United States. Age Era: Neogene. Period: Early Miocene. Faunal stage: Arikareean, ~23.1–21.9 Ma, calculates to a period of approximately . Geological Formation: Torreya Formation. Sites Leon County paleontological sites are represented by the following: *Griscom Plantation Site. Located in Killearn Lakes Plantation, south-southeast of Lake Iamonia on the southeast most section of Luna Plantation during a well drilling operation. Time period: ~23.6–18.8 Ma. ( AEO). Coordinates: *Seaboard Air Line Railroad Site. Location was south of the center of Tallahassee during a dredging operation for a roadway. Time period: ~21.7 Ma. (AEO, Alroy). Coordinates: *St. Marks River site. Located along the St. Marks River in southern Leon County. Time period: ~23.1–21.9 Ma. (AEO, Alroy).M. C. Coombs, R. M. Hunt, Jr., E. Stepleton, L. B. Albright, III, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oyster
Oyster is the common name for a number of different families of salt-water bivalve molluscs that live in marine or brackish habitats. In some species, the valves are highly calcified, and many are somewhat irregular in shape. Many, but not all oysters are in the superfamily Ostreoidea. Some types of oysters are commonly consumed (cooked or raw), and in some locales are regarded as a delicacy. Some types of pearl oysters are harvested for the pearl produced within the mantle. Windowpane oysters are harvested for their translucent shells, which are used to make various kinds of decorative objects. Etymology The word ''oyster'' comes from Old French , and first appeared in English during the 14th century. The French derived from the Latin , the feminine form of , which is the latinisation of the Ancient Greek () 'oyster'. Compare () 'bone'. Types True oysters True oysters are members of the family Ostreidae. This family includes the edible oysters, which mainly belong t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossiliferous
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] |
Quartz
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at . Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold. There are many different varieties of quartz, several of which are classified as gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia. Quartz is the mineral defining the val ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siliciclastic
Siliciclastic (or ''siliclastic'') rocks are clastic noncarbonate sedimentary rocks that are composed primarily of silicate minerals, such as quartz or clay minerals. Siliciclasic rock types include mudrock, sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) ..., and conglomerate. Siliciclastic sediments are silica-based sediments, lacking carbon compounds, which are formed from pre-existing rocks, by breakage, transportation and redeposition to form sedimentary rock.Oilfield Glossary: siliciclastic sediment. Retrieved 23 August 2018. References ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbonate
A carbonate is a salt of carbonic acid (H2CO3), characterized by the presence of the carbonate ion, a polyatomic ion with the formula . The word ''carbonate'' may also refer to a carbonate ester, an organic compound containing the carbonate group C(=O)(O–)2. The term is also used as a verb, to describe carbonation: the process of raising the concentrations of carbonate and bicarbonate ions in water to produce carbonated water and other carbonated beverageseither by the addition of carbon dioxide gas under pressure or by dissolving carbonate or bicarbonate salts into the water. In geology and mineralogy, the term "carbonate" can refer both to carbonate minerals and carbonate rock (which is made of chiefly carbonate minerals), and both are dominated by the carbonate ion, . Carbonate minerals are extremely varied and ubiquitous in chemically precipitated sedimentary rock. The most common are calcite or calcium carbonate, CaCO3, the chief constituent of limestone (as well a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wakulla County, Florida
Wakulla County is a county located in the Big Bend region in the northern portion of the U.S. state of Florida. As of the 2020 census, the population was 33,764. Its county seat is Crawfordville. Wakulla County is part of the Tallahassee, FL Metropolitan Statistical Area. Wakulla County has a near-absence of any municipal population, with two small municipalities holding about 3% of the population. The county seat, Crawfordville, is one of only two unincorporated county seats among Florida's 67 counties. History First Spanish period In 1528, Pánfilo de Narváez found his way to what would be Wakulla County from the future Pinellas County, Florida, camping at the confluence of the Wakulla and St. Marks rivers. Narváez determined this was a very suitable spot for a fort. In 1539, Hernando de Soto's expedition passed through ''La Florida'' with a similar route. The Fort San Marcos de Apalache began with a wooden fort in the late 1600s. The vicinity around the fort ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madison County, Florida
Madison County is a county located in the north central portion of the state of Florida, and borders the state of Georgia to the north. As of the 2020 census, the population was 17,968. Its county seat is also called Madison. History Located in what is known as the Florida Panhandle, Madison County was created in 1827. It was named for James Madison, fourth President of the United States of America, who served from 1809 to 1817. It was developed as part of the plantation belt, with cotton cultivated and processed by enslaved African Americans. In the period after Reconstruction, racial violence rose in the state, reaching a peak at the end of the 19th century and extending into the difficult economic years of the 1920s and 1930s. According to the Equal Justice Institute's 2015 report, ''Lynching in America: Confronting Racial Terror'', from 1877 to 1950, Madison County had 16 lynchings in this period, the 6th highest of any county in the state. The county's economic and popul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
