The Gettysburg Formation is a mapped bedrock unit consisting primarily of sandstones, conglomerates, and shales.
The Gettysburg Formation was first described in the Gettysburg area of Adams County, Pennsylvania in 1929,[1] and over the following decade was mapped in adjacent York County, Pennsylvania[4] and Frederick County, Maryland.[5] It was then typically called the "Gettysburg shale," and was described as "thick red shales and soft red sandstones." The majority of this early mapping was done by G. W. Stose, A. I. Jonas, and Florence Bascom. Later workers described it as "Red, medium- to fine-grained sandstone and shale."[2]
The rock unit was formalized into a Formation in 1963 by J. D. Glaeser.[6] Glaeser re-mapped some areas previously mapped as the Gettysburg Formation to the Hammer Creek Formation.
A major groundwater resources study of the Gettysburg Formation and other formations of the Newark Supergroup in Pennsylvania was published by Charles R. Wood in 1980.[2]
^ abcdeStose, G.W., and Bascom, Florence, 1929, Description of the Fairfield and Gettysburg quadrangles [Pennsylvania]: U.S. Geological Survey Geologic Atlas of the United States, Fairfield-Gettysburg folio, no. 225, 22 p.
^ abcWood, C. R., 1980, Groundwater resources of the Gettysburg and Hammer Creek Formations, southeastern Pennsylvania: Pennsylvania Geological Survey, 4th ser., Water Resource Report 49, 87 p. (web release).
^Jonas, A.I., and Stose, G.W., 1930, Geology and mineral resources of the Lancaster quadrangle, Pennsylvania: Pennsylvania Geological Survey Topographic and Geologic Atlas, 4th series, 168, 106 p., scale 1:62,500
^ abStose, G.W., and Jonas, A.I., 1939, Geology and mineral resources of York County, Pennsylvania: Pennsylvania Geological Survey County Report, 4th series, no. 67, 199 p.
^Jonas, A.I., and Stose, G.W., 1938, Geologic map of Frederick County and adjacent parts of Washington and Carroll Counties (Maryland): Maryland Geological Survey County Geologic Map, 1 sheet, scale 1:62,500
^Glaeser, J.D., 1963, Lithostratigraphic nomenclature of the Triassic Newark-Gettysburg basin: Pennsylvania Academy of Science Proceedings, v. 37, p. 179-188.
and 24 Related for: Gettysburg Formation information
The GettysburgFormation is a mapped bedrock unit consisting primarily of sandstones, conglomerates, and shales. The GettysburgFormation was first described...
The Battle of Gettysburg (locally /ˈɡɛtɪsbɜːrɡ/ ) was a three-day battle in the American Civil War fought between Union and Confederate forces between...
mapped as part of the GettysburgFormation in Adams County, Pennsylvania in 1929. J. D. Glaeser renamed part of the Gettysburg to the Hammer Creek in...
Passaic Formation) Bendersville Formation (equivalent to the Shuttle Meadow Formation) Aspers Basalt (equivalent to the Talcott Formation) Gettysburg Formation...
into the continents we see today. The New Oxford Formation is overlain by the GettysburgFormation in Frederick County, Maryland and in Adams, Cumberland...
were of the ichnogenus Atreipus and preserved in the Late Triassic GettysburgFormation. Near the end of the 19th century, in 1895, Andrew Carnegie endowed...
Battle of Gettysburg. The tactic still persists and is regularly employed by all branches of the modern armed forces. Tactically, echelon formations are used...
Theological Seminary at Gettysburg (Gettysburg Seminary) was a seminary of the Evangelical Lutheran Church in America (ELCA) in Gettysburg, Pennsylvania. It...
footprint bearing formations in Maryland were laid down during the Late Triassic on sediments that later became the GettysburgFormation north of Emmitsburg...
"Abstract". Weishampel and Young (1996); "Pennsylvania/Maryland (GettysburgFormation)", page 90. Weishampel and Young (1996); "The Dinosaur Lady", page...
infantry square, also known as a hollow square, was a historic close order formation used in combat by infantry units, usually when threatened with cavalry...
Conewago Mountains are underlain by Triassic conglomerate of the GettysburgFormation. Prowell, George R., History of York County, Pennsylvania, Chicago:...
formation and small cave on the lower slopes of Big Round Top. The igneous hill was formed 200 million years ago when the outcrop of the Gettysburg sill...
battles of Second Bull Run, Antietam, Fredericksburg, Chancellorsville, Gettysburg, Mine Run, Overland, Richmond-Petersburg, and Appomattox. The Iron Brigade...
Army of Northern Virginia led by General Robert E. Lee at the Battle of Gettysburg. He was born in Cádiz, Spain, to a wealthy Philadelphia merchant family...
dinosaur-bearing rock formations List of fossil sites "Aganane Formation." Weishampel, et al. (2004). Pg. 535. "Akaiwa Formation." Weishampel, et al. (2004)...
85–100. Clark Shaughnessy, "Father" of Modern T Formation, Dies Friday at 78 in California, Gettysburg Times, May 16, 1970. Yost, pp. 96-99. Bible, pp...
most famous for its defense of Little Round Top at the Battle of Gettysburg in Gettysburg, Pennsylvania, July 1–3, 1863. The 133rd Engineer Battalion of...
categorized as a basalt. The York Haven Diabase is a member of the larger Gettysburg Basin. It plays an important role in United States history as the diabase...
of Virginia. They are also known from the New Oxford or GettysburgFormation of the Gettysburg Basin in Maryland. Reports of Gwyneddichnium trackways in...
Mitchell discovered some small Grallator tracks in the Late Triassic GettysburgFormation of Maryland. These are the first and only known dinosaur tracks in...
Global Information