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^ Since 1983, Massachusetts has had 3 other official state rocks: State Historical Rock (Plymouth Rock), State Explorer Rock (Dighton Rock), and State Building and Monument Stone . In 2008, a State Glacial Rock (Rolling Rock) was designated as well. [82] ^ A measure passed the Oregon Senate in March 1965 naming the thunderegg as Oregon's state ...
The following is a list of the mapped bedrock units in Pennsylvania. The rocks are listed in stratigraphic order. [1] System Group name Formation name Member name
Rocks that characterize this region include: limestone, dolomite, slate, shale, sandstone, siltstone, and some scattered basalt. Almost all of the rocks in the Great Valley in Pennsylvania are Ordovician in age and were deposited during a quiet period before the Taconic orogeny. The limestones and dolomites of this area are extensively quarried ...
26 Pennsylvania. 27 South Dakota. 28 Tennessee. 29 Texas. 30 Utah. 31 Vermont. ... Newspaper Rock State Historic Monument; Notch Peak; Parriott Mesa; Rainbow Bridge ...
Rock formations of Pennsylvania (2 P) V. Valleys of Pennsylvania (6 C, 23 P) W. Waterfalls of Pennsylvania (1 C, 8 P) Wetlands of Pennsylvania (1 C, 4 P)
A city style marker in Philadelphia, the state's largest city Clickable map of Pennsylvania counties. This is a list of Pennsylvania State Historical Markers which were first placed by the Commonwealth of Pennsylvania in 1914 and are currently overseen by the Pennsylvania Historical and Museum Commission (PHMC) as part of its Historical Markers Program.
public/state Tioga State Forest: Known as the "Grand Canyon of Pennsylvania", a deep gorge carved by glacial meltwater. The maximum depth of the canyon is 1,450 feet (442 m) at Waterville, near the southern end. At Leonard Harrison and Colton Point State Parks, the depth is more than 800 feet and from rim to rim is approximately 4,000 feet ...
This is a List of National Historic Landmarks in Pennsylvania. There are 169 in the state. Listed in the tables below are the 102 NHLs outside Philadelphia. For the 67 within Philadelphia, see List of National Historic Landmarks in Philadelphia.