|
Hawthorn Group
The Hawthorn Group is a stratigraphic unit that includes several geologic formations of Late Oligocene to Pliocene age in North Florida, United States. It is known for its phosphate rock resources, and for its rich assemblages of Neogene vertebrate fossils. It was originally called the Waldo Formation by L.C. Johnson of the United States Geological Survey in 1887, and later became the Hawthorne Group named for Hawthorne, Florida, where its phosphate-rich rock was quarried and processed for use as fertilizer. Age Period: Neogene Epoch: Miocene Faunal stage: Chattian through early Blancan ~28.4 to ~2.588 mya, a period of Location The Hawthorn Group extends from Suwannee County in the north and southward to Hernando County. It encompasses in part the counties of Gilchrist, Levy, Dixie, Citrus, Sumter, Alachua and Marion County. The Hawthorn is also present below undifferentiated sediments (TQu) as well as the Tamiami Formation from Polk County south through Highlands, Glades, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratigraphic Unit
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 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 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 lithostratigraphic units are assigned by geological surveys. Units of formation or hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epoch (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 gl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marion County, Florida
Marion County is located in the northern portion of the U.S. state of Florida. As of the 2020 census, the population was 375,908. Its county seat is Ocala. Marion County comprises the Ocala, FL Metropolitan Statistical Area. it includes part of Ocala National Forest, which also extends into three other counties. History Native Americans Evidence of ancient indigenous cultures has been found in Marion County, as well as of the earliest encounter between European explorers and historic indigenous peoples. In 1976, an archaeological investigation found ancient artifacts in Marion County that appear to be the oldest in mainland United States. Excavations at an ancient stone quarry (on the Container Corporation of America site (8Mf154) in Marion County) yielded "crude stone implements". Thousands of pieces of chert were found at the site. These showed signs of extensive wear and were found in deposits below those holding Paleo-Indian artifacts. Thermoluminescence dating and weath ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alachua County, Florida
Alachua County ( ) is a county in the north central portion of the U.S. state of Florida. As of the 2020 census, the population was 278,468. The county seat is Gainesville, the home of the University of Florida since 1906, when the campus opened with 106 students. Alachua County is part of the Gainesville Metropolitan Statistical Area. The county is known for its diverse culture, local music, and artisans. Much of its economy revolves around the university, which had nearly 55,000 students in the fall of 2016. History Early history The first people known to have entered the area of Alachua County were Paleo-Indians, who left artifacts in the Santa Fe River basin before 8000 BCE. Artifacts from the Archaic period (8000 - 2000 BCE) have been found at several sites in Alachua County. Permanent settlements appeared in what is now Alachua County around 100 CE, as people of the wide-ranging Deptford culture developed the local Cades Pond culture. The Cades Pond culture gave way ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sumter County, Florida
Sumter County is a county located in the central portion of the U.S. state of Florida. As of the 2020 census, the population is 129,752. It has the oldest median age (68.3 years) of any US county and the highest percentage of residents aged 65 and older—at 55.6% in 2014-2018 (in 2009–2013). Its county seat is Bushnell, and the largest community is The Villages. Sumter County coincides with The Villages, FL Metropolitan Statistical Area, which is included in the Orlando-Lakeland-Deltona, FL Combined Statistical Area. History Sumter County was created in 1853. It was named for General Thomas Sumter, a general in the American Revolutionary War. The county in the past, and to this day by some, is nicknamed "Hog County" most likely because it is home to a large population of wild hogs. Hog hunting is still a favorite pastime of locals in the more rural portions of the county. Although long extremely rural, in recent years Sumter County has sustained an exceptionally large in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Citrus County, Florida
Citrus County is a county located on the west central coast of the U.S. state of Florida. As of the 2020 census, the population was 153,843. Its county seat is Inverness, and its largest community is Homosassa Springs. Citrus County comprises the Homosassa Springs, Florida Metropolitan Statistical Area. History The area covered by present-day Citrus County is thought to have been first occupied at least 10,000 years ago. About 2,500 years ago, mound-building Native Americans settled in the area and built the complex that now forms the Crystal River Archeological Site. The site was occupied for about 2,000 years. Why the complex was abandoned is currently unknown. Citrus County was created in 1887. The Citrus County area was formerly part of Hernando County. It was named for the county's citrus groves. Citrus production declined dramatically after the "Big Freeze" of 1894-1895: today, citrus is grown on one large grove, Bellamy Grove; additionally, some residents have citru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dixie County, Florida
Dixie County is a county located in the Big Bend region of the northern part of the U.S. state of Florida. As of the 2020 census, the population was 16,759. Its county seat is Cross City. History Dixie County was created in 1921 from the southern portion of Lafayette County and named for "Dixie", the common nickname for the southern United States. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (18.4%) is water. Adjacent counties * Taylor County - northwest * Lafayette County - north * Gilchrist County - east * Levy County - southeast National protected area * Lower Suwannee National Wildlife Refuge (part) Demographics As of the 2020 United States census, there were 16,759 people, 6,233 households, and 4,320 families residing in the county. As of the census of 2008, there were 14,957 people. In 2000 there were an estimated 5,205 households and 3,659 families residing in the county. The population density was 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Levy County, Florida
Levy County is a county located on the Gulf coast and in the northern part of the U.S. state of Florida. As of the 2020 census, the population was 42,915. Its county seat is Bronson. History Levy County was created in 1845, after the Seminole Wars. It was named for David Levy Yulee, a planter elected in 1841 as the state's territorial delegate to the US House of Representatives, where he served two terms. Levy provided for long-term development in the state by constructing the first railroad across Florida, the Florida Railroad, linking the deep-water ports of Fernandina (Port of Fernandina) on the Atlantic Ocean and Cedar Key on the Gulf of Mexico. The Rosewood Massacre occurred in Levy County in the first week of January 1923. White citizens from the nearby town of Sumner, reacting to a what turned out to be a false accusation that a black man raped a white woman, burned the predominantly black town of Rosewood to the ground and brutally murdered several of Rosewood's b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gilchrist County, Florida
Gilchrist County is a county located in the north central part of the U.S. state of Florida. Organized in 1925 from the western part of Alachua, it is the last county to be formed in the state. As of the 2020 census, the population was 17,864. The county seat is Trenton. Gilchrist County is included in the Gainesville, FL Metropolitan Statistical Area. History Gilchrist County was created in 1925, the last county organized in Florida. It was named for Albert W. Gilchrist, Governor of Florida from 1909 to 1913. It was formed by residents of what was then western Alachua County, as they believed they were not getting adequate representation on the county commission. With the poor roads of the time, they felt it took too long to get to the county seat of Gainesville. They disagreed about a proposed law that would require fencing in cattle in the rural area. They also believed that they would be better off by getting their own share of racetrack revenues, which the state dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hernando County, Florida
Hernando County is a county located on the west central coast of the U.S. state of Florida. As of the 2020 census, the population was 194,515. Its county seat is Brooksville, and its largest community is Spring Hill. Hernando County is included in the Tampa-St. Petersburg-Clearwater, FL Metropolitan Statistical Area. As of 2005, Hernando was the 35th fastest-growing county in the country. History Around 1840, Fort DeSoto was established in present-day Hernando County in the northeast edge of present-day Brooksville to protect settlers in the area from Native Americans. Fort DeSoto became a small community center, trading post, and way station on the route to Tampa. Settlements started to grow near the fort beginning around 1845; two towns developed, Melendez and Pierceville, which would later merge to create Brooksville in 1856. Then encompassing a significantly larger area of west central Florida than it does today, Hernando County was officially established on February ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suwannee County, Florida
Suwannee County is a county located in the north central portion of the state of Florida. As of the 2020 census, the population was 43,474, up from 41,551 in 2010. Its county seat is Live Oak. Suwannee County was a dry county until August 2011, when the sale of alcoholic beverages became legal in the county. History Suwannee County was created in 1858, as railways were constructed through the area connecting it to Jacksonville, Tallahassee, and points north. It was named after the Suwannee River, which forms the county's northern, western, and much of its southern border. The word "Suwannee" may either be a corruption of the Spanish ''San Juan'' ("Saint John") or from the Cherokee ''sawani'' ("echo river"). The rural areas supported numerous lumber and turpentine camps. In the 1930s, anthropologist Zora Neale Hurston did research in North Florida timber camps. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.5%) is wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mya (unit)
Mya may refer to: Brands and product names * Mya (program), an intelligent personal assistant created by Motorola * Mya (TV channel), an Italian Television channel * Midwest Young Artists, a comprehensive youth music program Codes * Burmese language, ISO 639-3 code is * Moruya Airport's IATA code * The IOC, license plate, and UNDP country code for Myanmar ("MYA") People * Mya (given name) * Mya (singer) (Mya Marie Harrison, born 1979), an American R&B singer-songwriter and actress * Bo Mya (1927–2006), nom de guerre of a Myanmar rebel leader, chief rapist of the Karen National Union Other uses * ''Mýa'' (album), a 1998 album by Mýa * ''Mya'' (bivalve), a genus of soft-shell clams * MYA (unit) for "million years ago", a science-related unit of time used in astronomy, geology and biology See also * A (motor yacht) (M/Y A), a superyacht * Maia (other) * Maya (other) Maya may refer to: Civilizations * Maya peoples, of southern Mexico and norther ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Citrus County, Florida")
