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Baltimore Gabbro Complex
Baltimore Gabbro Complex is a hypersthene gabbro with subordinate amounts of olivine gabbro, norite, anorthositic gabbro, and pyroxenite. Igneous minerals and textures are well preserved in some rocks, and other rocks exhibit varying degrees of alteration and recrystallization with a new metamorphic mineral assemblage. Early Quarrying Baltimore Gabbro Complex was an early roadbed material for the Central Maryland Region. It was specified as "trap" or " nigger-head". It was mined in the Stoney Forest area of Harford and Cecil Counties, along the Susquehanna in Baltimore and as far south as Laurel. In 1996, Kingdon Gould III's Laurel Sand and Gravel company which includes Fairfax Materials, Allegany Aggregates, Laurel Asphalt and S.W. Barrick & Sons purchased the 600 acres chase property north of the historic town of Savage, Maryland. The site is home to the Savage Stone quarry, mining Baltimore Gabbro for road bed construction. The material is amble to support 50,000 pounds per sq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igneous
Igneous rock (derived from the Latin word ''ignis'' meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive rocks. Igneous rock may form with crystallization to form granular, crystalline rocks, or without crystallization to form natural glasses. Igneous rocks occur in a wide range of geological settings: shields, platforms, orogens, basins, large igneous provinces, extended crust and oceanic crust. Geological significance Igneous and metamorphic rocks make up 90–95% of the top ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metamorphic
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causing profound physical or chemical changes. During this process, the rock remains mostly in the solid state, but gradually recrystallizes to a new texture or mineral composition. The protolith may be an igneous, sedimentary, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by their protolith, their chemical and mineral makeup, and their texture. They may be formed simply by being deeply buried beneath the Earth's surface, where they are subject to high temperatures and the great pressure of the rock layers above. They can also form from tectonic processes such as continental collisions, which cause horizontal pressure, friction, and distorti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plutonic Rocks
Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form '' intrusions'', such as batholiths, dikes, sills, laccoliths, and volcanic necks.Intrusive RocksIntrusive rocks accessdate: March 27, 2017.Igneous intrusive rocks, accessdate: March 27, 2017.Britannica.comintrusive rock , geology , Britannica.com accessdate: March 27, 2017. Intrusion is one of the two ways igneous rock can form. The other is extrusion, such as a volcanic eruption or similar event. An intrusion is any body of intrusive igneous rock, formed from magma that cools and solidifies within the crust of the planet. In contrast, an ''extrusion'' consists of extrusive rock, formed above the surface of the crust. Some geologists use the term plutonic rock synonymously with intrusive rock, but other geologists subdivide intrusive rock, by crystal size, into coarse-grained plutonic rock (typically formed deeper in the Earth's crust in batholiths or stocks) a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guilford Quartz Monzonite
The Guilford Quartz Monzonite is a Silurian or Ordovician quartz monzonite pluton in Howard County, Maryland. It is described as a biotite-muscovite-quartz monzonite which occurs as discontinuous lenticular bodies which intrude mainly through the Wissahickon Formation (gneiss). The extent of this intrusion was originally mapped in 1940Cloos, Ernst, and Broedel, C.H., 1940, Geologic map of Howard County and adjacent parts of Montgomery and Baltimore Counties (Maryland): Maryland Geological Survey County Geologic Map, 1 sheet, scale 1:62,500 as the "Guilford granite". It was given its current name in 1964 by C. A. Hopson.Hopson, C. A., 1964, The crystalline rocks of Howard and Montgomery Counties: Maryland Geological Survey County Report, 337 p., (Reprinted from Cloos, Ernst, and others, "Geology of Howard and Montgomery Counties," p. 27-215) Hopson grouped the Guilford Quartz Monzonite with the Ellicott City Granodiorite and the Woodstock Quartz Monzonite as "Late-kinematic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Woodstock Quartz Monzonite
The Woodstock Quartz Monzonite is a Silurian or Ordovician quartz monzonite pluton in Baltimore County, Maryland. It is described as a massive biotite-quartz monzonite which intrudes through the Baltimore Gneiss at a single locality surrounding the town of Granite, Maryland. The extent of this intrusion was originally mapped in 1892 as the "Woodstock granite". It was given its current name in 1964 by C. A. Hopson.Hopson, C. A., 1964, The crystalline rocks of Howard and Montgomery Counties: Maryland Geological Survey County Report, 337 p., (Reprinted from Cloos, Ernst, and others, "Geology of Howard and Montgomery Counties," p. 27-215) Hopson grouped the Woodstock Quartz Monzonite with the Ellicott City Granodiorite and the Guilford Quartz Monzonite as "Late-kinematic intrusive masses." Woodstock granite has been used in the Capitol Building, the Library of Congress, and in buildings in Baltimore. Description The Woodstock Quartz Monzonite was described in 1898 as "perhaps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Ordovician
The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start of the Silurian Period Mya. The Ordovician, named after the Welsh tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in North Wales in the Cambrian and Silurian systems, respectively. Lapworth recognized that the fossil fauna in the disputed strata were different from those of either the Cambrian or the Silurian systems, and placed them in a system of their own. The Ordovician received international approval in 1960 (forty years after Lapworth's death), when it was adopted as an official period of the Paleozoic Era by the International Geological Congress. Life continued to flourish during the Ordovician as it did in the earlier Cambrian Peri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleozoic
The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ''zōḗ'' (), "life", meaning "ancient life" ). It is the longest of the Phanerozoic eras, lasting from , and is subdivided into six geologic periods (from oldest to youngest): # Cambrian # Ordovician # Silurian # Devonian # Carboniferous # Permian The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era. The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. The Cambrian witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared. Arthropods, molluscs, fish, amphibians, reptiles, and synapsids all evolved during the Paleozoic. Life began in the ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Savage, Maryland
Savage is an unincorporated community and census-designated place located in Howard County, Maryland, United States, approximately south of Baltimore and north of Washington, D.C. It is situated close to the city of Laurel and to the planned community of Columbia. As of the 2010 census it had a population of 7,054. The former mill town is a registered historic place, and has many original buildings preserved within and around the Savage Mill Historic District. History The lands of Savage were first settled ''circa'' 1650. Colonel Henry Ridgley surveyed the land around Savage Mill and nearby Annapolis Junction in 1685, naming the tract "Ridgely's Forrest". Joseph White was the grandson of Peregrine White, the first child born of the Mayflower expedition. In 1734, he opened a gristmill on land patented as "Whites Fortune" and "Mill Land". The parcels were consolidated to become "Whites Contrivance". A rich vein of American industrial history lies in Savage. When the textile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingdon Gould III
Kingdon Gould III (born June 16, 1948) is an American real estate developer, active in the Washington, D.C.-area. He is part of the fifth generation of the Gould family of financiers, philanthropists and diplomats, which includes his father Kingdon Gould, Jr., grandfather Kingdon Gould Sr., great-grandfather George Jay Gould and great-great-grandfather Jay Gould, with associated generations of mothers, siblings, uncles, aunts and cousins. Life and career He was born in New Haven, Connecticut, on June 16, 1948, to Kingdon Gould, Jr., and his wife, Mary Bunce Gould (née Thorne). He was made part owner and vice president of Gould Property Company, his father's real estate firm and one of the largest and oldest real estate development firms in the D.C. metropolitan area.McQuaid, Kevin L. "Manekin Starts Work on Big P.G. Co. Mixed-Use Project." ''Baltimore Business Journal.'' November 15, 1991. He was the company's spokesperson when the Hyatt Regency Crystal City hotel and the Mayf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stoney Forest
Stoney may refer to: Places * Stoney, Kansas, an unincorporated community in the United States * Stoney Creek (other) * Stoney Pond, a man-made lake located by Bucks Corners, New York * Stoney (lunar crater) * Stoney (Martian crater) Arts and entertainment * ''Stoney'' (album), by Post Malone * the title character of '' Stoney Burke'', an American TV series * the Stoney family, fictional characters in '' Blackstone'', a Canadian TV series People * Stoney (name), a list of people with the given name, nickname, stage name or surname * Stoney (musician), British musician Mark Stoney (born 1980) * Stoney, or Shaun Murphy (singer), American singer-songwriter * Nakoda (Stoney), an indigenous people in both Canada and the United States Other uses * Stoney (drink), a soft drink sold in Africa * Stoney language, a Siouan language spoken in Canada * Assiniboine language, also known as Stoney, a Nakotan Siouan language of the Northern Plains of Canada and the United States Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nigger-head
In several English-speaking countries, ''niggerhead'' or ''nigger head'' is a former name for several things thought to resemble the head of a black person (cf. "nigger"). The name is now taboo in normal usage. The term was once widely used for all sorts of things, including nautical bollards and consumer products including soap, chewing tobacco, stove polish, canned oysters and shrimp, golf tees, and toy cap pistols, among others. It was often used for geographic features such as hills and rocks and geological objects such as geodes. The term appears in several US patents for mechanical devices prior to about 1950. Languages other than English have used similar terms to describe chocolate-coated marshmallow treats. In 1955, the Aughinbaugh Canning Company of Mississippi renamed its "Nigger Head Brand" oysters to "Negro Head Brand" following pressure from the National Association for the Advancement of Colored People. More than a hundred "Niggerheads", and other place names now ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroxenite
Pyroxenite is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite, diopside, hypersthene, bronzite or enstatite. Pyroxenites are classified into clinopyroxenites, orthopyroxenites, and the websterites which contain both types of pyroxenes (see diagram below). Closely allied to this group are the hornblendites, consisting essentially of hornblende and other amphiboles. They are essentially of igneous origin, though some pyroxenites are included in the metamorphic Lewisian complex of Scotland. The pyroxene-rich rocks, which result from the type of contact metamorphism known as pyroxene-hornfels facies, have siliceous sediment or basaltic protoliths, and are respectively metapelites and metabasites. Intrusive and mantle pyroxenites Igneous pyroxenites are closely allied to gabbros and norites, from which they differ by the absence of feldspar, and to peridotites, which are distinguished from them by containing more than 40% olivine. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
