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Caves Of Maryland
This is a List of caves of Maryland. Maryland has numerous caves, with the greatest concentration in its western counties: Washington, Allegany, and Garrett. Research on the topic There are a number of sources about the topic area, including a reference book titled ''Caves of Maryland'' which was first released by the Maryland Geological Survey (MGS) in 1950. But information about Maryland caves was first gathered into a series of reports by Martin Muma in the mid-1940s, working under the MGS. After the release of these articles in 1946, a more comprehensive study was begun by William Davies, whose years of fieldwork led to the compilation of the premiere edition of ''Caves of Maryland'' in 1950. Following the release of the first edition of ''Caves of Maryland'' in 1950, several other attempts by various parties and interested groups have been made at expanding available information concerning Maryland's subterrain. In the late 1960s the MGS sponsored another statewide surv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maryland
Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean to its east. Baltimore is the largest city in the state, and the capital is Annapolis. Among its occasional nicknames are '' Old Line State'', the ''Free State'', and the '' Chesapeake Bay State''. It is named after Henrietta Maria, the French-born queen of England, Scotland, and Ireland, who was known then in England as Mary. Before its coastline was explored by Europeans in the 16th century, Maryland was inhabited by several groups of Native Americans – mostly by Algonquian peoples and, to a lesser degree, Iroquoian and Siouan. As one of the original Thirteen Colonies of England, Maryland was founded by George Calvert, 1st Baron Baltimore, a Catholic convert"George Calvert and Cecilius Calvert, Barons Baltimore" William Hand Browne, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick, Maryland
Frederick is a city in and the county seat of Frederick County, Maryland. It is part of the Baltimore–Washington Metropolitan Area. Frederick has long been an important crossroads, located at the intersection of a major north–south Native American trail and east–west routes to the Chesapeake Bay, both at Baltimore and what became Washington, D.C. and across the Appalachian mountains to the Ohio River watershed. It is a part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area, which is part of a greater Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area. The city's population was 78,171 people as of the 2020 United States census, making it the second-largest incorporated city in Maryland (behind Baltimore). Frederick is home to Frederick Municipal Airport ( IATA: FDK), which accommodates general aviation, and Fort Detrick, a U.S. Army bioscience/communications research installation and Frederick county's largest emplo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anticline
In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex up in which the hinge or crest is the location where the curvature is greatest, and the limbs are the sides of the fold that dip away from the hinge. Anticlines can be recognized and differentiated from antiforms by a sequence of rock layers that become progressively older toward the center of the fold. Therefore, if age relationships between various rock strata are unknown, the term antiform should be used. The progressing age of the rock strata towards the core and uplifted center, are the trademark indications for evidence of anticlines on a geologic map. These formations occur because anticlinal ridges typically develop above thrust faults during crustal deformations. The uplifted core of the fold causes compression of strata that preferentially erodes to a deeper st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chambersburg Formation
The Chambersburg Formation is a geologic formation in Virginia. It preserves fossils dating back to the Ordovician period. See also * List of fossiliferous stratigraphic units in Virginia * Paleontology in Virginia Paleontology in Virginia refers to paleontological research occurring within or conducted by people from the U.S. state of Virginia. The geologic column in Virginia spans from the Cambrian to the Quaternary. During the early part of the Paleozoic ... References * Ordovician geology of Virginia Ordovician southern paleotemperate deposits {{Virginia-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rockdale Run Formation
The Rockdale Run Formation is a geologic formation in Maryland, Pennsylvania, Virginia and West Virginia. It preserves fossils dating back to the Ordovician period. See also * List of fossiliferous stratigraphic units in Maryland * List of fossiliferous stratigraphic units in Pennsylvania * List of fossiliferous stratigraphic units in Virginia * List of fossiliferous stratigraphic units in West Virginia This article contains a list of fossil-bearing stratigraphic units in the state of West Virginia, U.S. Sites See also * Paleontology in West Virginia References * {{DEFAULTSORT:Fossiliferous stratigraphic units in West Virginia West V ... References * Ordovician System of North America Ordovician Maryland Ordovician geology of Virginia Ordovician southern paleotemperate deposits Lower Ordovician Series {{Virginia-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elbrook Formation
The Elbrook Formation is a geologic formation in West Virginia, Maryland, and Pennsylvania. It dates back to the Cambrian period. Fossils of trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the At ... fragments have been discovered, but they are rare. The Elbrook Formation is not considered fossiliferous. References Generalized Stratigraphic Chart for West Virginia Cambrian West Virginia {{Cambrian-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waynesboro Formation
The Waynesboro Formation is a limestone, dolomite, and sandstone geologic formation in Virginia, Maryland, Pennsylvania and West Virginia. In some areas it is composed of limestone and dolomite. The Waynsboro Formation is one of the formations that make up the Shenandoah Valley. It dates back to the Cambrian period and is not considered fossiliferous. Description The Waynesboro Formation is a predominantly limestone, dolomite, and sandstone formation that is found along the valley floor of the Shenandoah Valley. It can also contain sometimes large beds of siltstone and shale. The Waynesboro is often covered by gravel washes from surrounding mountains or by weathered debris from the formation itself, making finding outcrops for study difficult. The formation is thought to represent a shallow marine depositional environment. It was called the Watuga shale in parts of Virginia, but the name was abandoned in favor of the already established Waynesboro Formation. The Waynesboro Format ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tomstown Dolomite
The Tomstown Dolomite or Tomstown Formation is a geologic formation in Maryland, Pennsylvania, Virginia and West Virginia. It preserves fossils dating to the Cambrian Period. In Maryland it is described as "Interbedded light gray to yellowish-gray, thin- to thick-bedded dolomite and limestone; some shale layers; gradational contact with Antietam; thickness 200 to 1,000 feet." See also * List of fossiliferous stratigraphic units in Maryland * List of fossiliferous stratigraphic units in Pennsylvania * List of fossiliferous stratigraphic units in Virginia * List of fossiliferous stratigraphic units in West Virginia This article contains a list of fossil-bearing stratigraphic units in the state of West Virginia, U.S. Sites See also * Paleontology in West Virginia References * {{DEFAULTSORT:Fossiliferous stratigraphic units in West Virginia West V ... References * Geologic formations of Maryland Cambrian geology of Pennsylvania Geologic formations of Virginia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hagerstown Valley
Hagerstown Valley is located in Maryland in the United States. It is part of the Great Appalachian Valley, which continues northward as Cumberland Valley in Pennsylvania, and southward as Shenandoah Valley in West Virginia and Virginia. Hagerstown Valley is bounded on the east by South Mountain, part of the Blue Ridge Mountains. On the west the valley is bounded by the Bear Pond Mountains — a range of mountains linking Blue Mountain and North Mountain. The valley is bounded on the south by the Potomac River and on the north by the drainage divide between Conococheague Creek, which flows south to the Potomac River, and Conodoguinet Creek, which flows northeast to the Susquehanna River. Sometimes the boundary between Hagerstown Valley and Cumberland Valley is defined politically, as the state line between Maryland and Pennsylvania. The political definition restricts Hagerstown Valley to Washington County, Maryland, while the larger definition includes part of Franklin Coun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cumberland Valley
The Cumberland Valley is a northern constituent valley of the Great Appalachian Valley, within the Atlantic Seaboard watershed in Pennsylvania and Maryland. The Appalachian Trail crosses through the valley. Geography The valley is bound to the west and north by the Ridge-and-Valley Appalachians (Bear Pond Mountains/Blue Mountain (Pennsylvania), Blue Mountain), to the east and south by South Mountain (Maryland and Pennsylvania), South Mountain, to the northeast by the Susquehanna River at Harrisburg, Pennsylvania, Harrisburg, and to the south by the Potomac River. The portion of the valley residing in Maryland is sometimes referred to as the Hagerstown Valley. The Cumberland Valley Railroad, the Cumberland Valley AVA wine region, and the Cumberland Valley School District are named for the region. Settlements Cities in the Cumberland Valley include Harrisburg, Pennsylvania, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick County, Maryland
Frederick County is located in the northern part of the U.S. state of Maryland. At the 2020 U.S. Census, the population was 271,717. The county seat is Frederick. Frederick County is included in the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area. Like other outlying sections of the Washington metropolitan area, Frederick County has experienced a rapid population increase in recent years. It borders the southern border of Pennsylvania and the northeastern border of Virginia. The county is the location of Catoctin Mountain Park (encompassing the presidential retreat Camp David) and the U.S. Army's Fort Detrick. Etymology The namesake of Frederick County and its county seat is unknown, but it was probably either Frederick, Prince of Wales, or Frederick Calvert, 6th Baron Baltimore. History Frederick County was created in 1748 by the Province of Maryland from parts of Prince George's County and Baltimore County. In 1776, following US independence, F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Mountain (Maryland And Pennsylvania)
South Mountain is the northern extension of the Blue Ridge Mountain range in Maryland and Pennsylvania. From the Potomac River near Knoxville, Maryland in the south to Dillsburg, Pennsylvania in York County, Pennsylvania in the north, the range separates the Hagerstown and Cumberland valleys from the Piedmont regions of the two states. The Appalachian National Scenic Trail follows the crest of the mountain through Maryland and a portion of Pennsylvania. Geography South Mountain begins at the Potomac River as a low, narrow ridge, barely one mile wide and only above sea level at its crest. South of the Potomac River in Virginia, the ridge continues as Short Hill Mountain for about before subsiding near the town of Hillsboro. South Mountain in Maryland gradually grows higher and wider towards the north. Near the Pennsylvania border, the mountain merges with the hills of the parallel Catoctin Mountain range to the east and becomes more like a low mountain range than a single cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
