Geology topics

William L. Lyke

Publications and source records attributed to William L. Lyke.

6 recordsLinked to original sources

USGS1995

Ground Water Atlas of the United States: Segment 10, Illinois, Indiana, Kentucky, Ohio, Tennessee

This report provides a summary of ground-water conditions and problems in Illinois, Indiana, Kentucky, Ohio, and Tennessee, which compose Segment 10 of the Ground Water Atlas of the United States, an area of about 217,000 square miles. The definition, distribution, thickness, water-yielding, and water-quality characteristics of the principal aquifers in the segment are the primary topics of this chapter. Ground-water source, occurrence, movement, use, and problems also are discussed where appropriate. Segment 10 consists of parts of seven physiographic provinces (fig. 1)- the Coastal Plain, Blue Ridge, Valley and Ridge, Appalachian Plateaus, Interior Low Plateaus, Central Lowland, and Ozark Plateaus. The provinces have unique hydrogeologic characteristics that make it convenient to describe the principal aquifers in each province.

Illinois, Indiana, Kentucky, Ohio, Tennessee↗

USGS1989

Potentiometric surface of the Black Creek Aquifer in the central coastal plain of North Carolina, December 1986

Water level measurements were made in 95 wells open to the Black Creek aquifer at the end of 1986 to determine the configuration of its potentiometric surface over an area of about 4,900 sq mi in the central Coastal Plain of North Carolina. The altitude of the potentiometric surface of the Black Creek ranges between 80 and 100 ft above sea level along the western limit of the aquifer. From there the potentiometric surface slopes southeasterly toward a large, elongated cone of depression that has coalesced from cones that have developed around three main pumping centers and several smaller ones. The potentiometric surface in the Black Creek has declined to more than 120 ft below sea level in the southernmost cone developing near Jacksonville in Onslow County.

North Carolina↗

USGS1989

Potentiometric surface of the lower Cape Fear aquifer in the central coastal plain of North Carolina, December 1986

Water level measurements were made in four wells open to the lower Cape Fear aquifer at the end of 1986 to determine the configuration of its potentiometric surface over an area of approximately 4,100 sq mi. Because of the scarcity of data, five earlier measurements were also used to help estimate the position of the potentiometric contours. These were one-time measurements in temporary observation wells. A broad cone of depression has formed in the area between Kinston and New Bern where the potentiometric surface is below sea level and seems likely related to large groundwater withdrawals from the aquifers overlying the lower Cape Fear in that area.

North Carolina↗

USGS1989

Potentiometric surface of the upper Cape Fear aquifer in the central coastal plain of North Carolina, December 1986

Water-level measurements were made in 84 wells open to the upper Cape Fear aquifer at the end of 1986 to determine the configuration of its potentiometric surface over an area of approximately 5,500 sq mi. The major feature of the potentiometric surface is the development of a large, almost circular cone of depression as a result of the merging of a number of smaller cones. The center of the large cone lies along an axis between Greenville and Kinston. The potentiometric surface in the upper Cape Fear is nearly 100 ft below sea level at Greenville; it is more than 100 ft above sea level south of the Neuse River near Colorado.

North Carolina↗

USGS1989

Potentiometric surface of the Peedee aquifer in the central coastal plain of North Carolina, December 1986

Water level measurements were made in 37 wells open to the Peedee aquifer at the end of 1986 to determine the configuration of its potentiometric surface over an area of about 4,100 square miles in the central Coastal Plain of North Carolina. The potentiometric surface of the Peedee slopes southeastward from an altitude of more than 100 ft above sea level along the western limits of the aquifer to less than 20 ft near the coastline. Several cones of depression have formed in response to the effects of groundwater pumpage. The largest cone occurs near the City of Jacksonville in Onslow County where the potentiometric surface is nearly 70 ft below sea level.

North Carolina↗

USGS1986

Altitude of basement surface in the central coastal plain area of North Carolina

The altitude of the basement surface in the central Coastal Plain of North Carolina ranges from 140 ft above sea level in Wayne County near the Fall Line to 2,400 ft below sea level near the coast in Beaufort County. The slope increases to the east from about 20 ft/mi at the fall line to about 70 ft/mi at the eastern edge of the study area. The irregular nature of the basement surface is demonstrated by: (1) the variable altitudes of the basement surface in the western portion of the study area; (2) the protruding granite/gneiss rock body at a quarry near the Town of Fountain, Pitt County; and (3) the flattening of the basement surface slope observed near the Jones County and Craven County border. Basement rock types in this study area include granite, granite gneiss, metavolcanic, and metasedimentary rocks of Precambrian to Paleozoic age.

Water-Resources Investigations Report↗