Pennsylvania Geological Survey
Encyclopedia
The Pennsylvania Geological Survey or Bureau of Topographic and Geologic Survey (BTGS), is a geological survey enacted by the Pennsylvania General Assembly
Pennsylvania General Assembly
The Pennsylvania General Assembly is the state legislature of the U.S. state of Pennsylvania. The legislature convenes in the State Capitol building in Harrisburg. In colonial times , the legislature was known as the Pennsylvania Provincial Assembly. Since the Constitution of 1776, written by...

 "to serve the citizens of Pennsylvania by collecting, preserving, and disseminating impartial information on the Commonwealth's geology, geologic resources, and topography in order to contribute to the understanding, wise use, and conservation of its land and included resources." The geological survey operates under the Pennsylvania Department of Conservation and Natural Resources
Pennsylvania Department of Conservation and Natural Resources
The Pennsylvania Department of Conservation and Natural Resources , established on July 1, 1995, is the agency in the U.S. State of Pennsylvania responsible for maintaining and preserving the state's 117 state parks and 20 state forests; providing information on the state's natural resources; and...

.

History

In total, four surveys have been conducted in the commonwealth. The first survey was created in 1836, making it one of the oldest geological survey
Geological survey
The term geological survey can be used to describe both the conduct of a survey for geological purposes and an institution holding geological information....

s in the United States. It was followed by the Second Survey, which ran from 1874 to approximately 1895; and the Third Survey, which ran from 1910 to 1919. The fourth, and current, survey was created in 1919 and continues today.

Activities

The Survey has provided orthoimagery and digital topographic data derived from lidar through the PAMAP program. The Survey provides oil and gas well information through PA*IRIS. BTGS participates in federally-funded StateMap program to produce 1:24000 geological maps.
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