Needmore Shale facts for kids
Quick facts for kidsNeedmore Formation
Stratigraphic range: Emsian
|Underlies||Marcellus Shale and Millboro Shale|
|Extent||Maryland, Pennsylvania, Virginia, and West Virginia|
|Named for||Needmore, Pennsylvania|
|Named by||Willard and Cleaves, 1939|
The Needmore Formation was originally described by Willard and Cleaves in 1939 as a dark- to medium-gray limy shale, based on exposures in southern Fulton County, Pennsylvania. They considered it part of the Onondaga Group.
DeWitt and Colton (1964) described the Needmore as "soft calcareous medium dark-brownish-gray and greenish-gray shale and mudrock...and soft, slightly calcareous very fissile brownish-black shale" that is not resistant to weathering. They estimated its thickness in their study area (southern Bedford County, Pennsylvania, and most of Allegany County, Maryland) as approximately 150 feet.
Relative age dating places the Needmore in the middle Devonian.
Needmore Shale Facts for Kids. Kiddle Encyclopedia.