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Lackawanna
State Park is home to Lackawanna Lake, a 198-acre body of water whose
presence is the result of the combined efforts of glaciation and humans.
The general landscape here is characterized by bedrock hills that are separated
by valleys partly filled with glacial till of varying depths, up to 150 feet on
the north end of the park. These masses of till often block former
drainage valleys and form "beaded valleys"
consisting of narrower and wider segments. The wider segments often are
now occupied by wetlands and lakes dammed by humans or beavers.
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Spillway at Lackawanna State Park, Lackawanna
County. Photo by J. Stevens
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In 1968, a high dam was constructed at an area where a breach had eroded
through one of the till knobs. This formed Lackawanna Lake as the South
Branch of the Tunkhannock Creek was impounded. The outlet stream now flows over
the bedrock spillway pictured above.
Several of the tributaries feeding the lake
are good examples of valleys oriented nearly perpendicular to the direction of
glacial movement (ranging from S24°W to S37°W in this quadrangle.) They
are characterized by a gently-sloped, till-covered north side and a steeper
bedrock south side.
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| Reference: Braun,
Duane D. 2002. Surficial Geology of
the Dalton 7.5' Quadrangle. Pennsylvania
Geological Survey, 4th Series. Open
File Report. (In press)
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