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Penns Valley
Penns Valley is an eroded anticlinal valley of the Pennsylvania ridge and valley geologic region of the Appalachian Mountain range. The valley is located in southern Centre County, Pennsylvania. Along with the Nittany Valley to the north and east, it is part of the larger Nittany Anticlinorium. It is bordered by Nittany Mountain to the north, the Seven Mountains range to the south, and connects to the larger Nittany Valley to the west. There are two smaller subordinate valleys typically associated with the greater valley; Georges Valley in the south, separated by Egg Hill, and Brush Valley in the north, separated by Brush Mountain.
==History==
The Appalachian Mountain chain was formed starting around 420 million years ago with the collision of the North American craton and the Iapetus Ocean and culminating with the collision of the modern-day eastern seaboard of the then Euramerican continent with Africa, then Gondwana, about 290 million years ago forming the supercontinent Pangea. Since the collision event the mountains have been eroding from the break-up of Pangea and through sedimentation formed the coastal plains to the east and limestone plateaus to the west. The footprints of the mountains formed the ridge and valley geological region in which Penns Valley was formed through glacial and other activity.
More recently the area now known as Penns Valley was discovered by General James Potter in 1764 who trekked through the region and observed the prairies and woodlands of the area and settled at Old Fort, near Centre Hall, in 1774. Upon observing the valley from above he exclaimed, "... I have discovered an empire." Penns Valley also hosts the oldest town of Centre County, Aaronsburg, which was planned out in 1786. At the close of the 18th century Penns Valley was already set aside for farmland, however, the surrounding county rapidly boomed as iron ore was discovered and the first road built by Philadelphia land speculator Reuben Haines brought the rest of Pennsylvania into the heart of Penns Valley terminating at the location of Spring Mills.
In the following two hundred years the iron industry would wane, but the agricultural heritage within Penns Valley would continue, and with the growth of a small land grant university just to the east in State College, The Pennsylvania State University would give the region a new academic wave of prosperity for the 21st century.〔(【引用サイトリンク】url=http://centrecountyhistory.org/history/overview.html )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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