The terms barrier ridge, a term of art in the earth sciences, especially geology and sometimes barrier range (more common as a geography term) describing...

east-west Native American trail that crossed the Allegheny Mountains barrier ridge connecting the Susquehanna River valleys in the center of Pennsylvania...

Delaware River valleys or wind gaps, low gaps in the ridge caused by ancient watercourses. The barrier ridge forms a distinct boundary between a number of Pennsylvania's...

valleys) along the saddle between two higher barrier ridge-lines in the eastern face atop the Allegheny Ridge or Allegheny Front escarpment. The front extends...

Ridge in the Ridge-and-Valley Appalachians in Carbon County and Schuylkill County in Pennsylvania is a steep-faced, anthracite-bearing barrier ridge just...

Barrier islands are a coastal landform, a type of dune system and sand island, where an area of sand has been formed by wave and tidal action parallel...

ridge and valley system presents an important obstacle to east–west land travel even with today's technology. It was a nearly insurmountable barrier to...

Formation, here named in Harrison Co., southeastern MS, described as barrier ridge composed of white, medium- to fine-grained sand, yellow-orange near...

the western United States to ridges that formed a rocky barrier to land travel, by analogy with ocean reefs as barriers to sea travel. Examples include...

Traffic barriers (known in North America as guardrails or guard rails, in Britain as crash barriers, and in auto racing as Armco barriers) keep vehicles...

below sea level. It is separated from the Indian Ocean by a beach barrier ridge and barrier dune system. Similar to Lake MacLeod, 40 kilometres (25 mi) to...

exists to a low pass allowing easier wagon-era travel among the barrier mountains of the Ridge-and-valley Appalachians giving access into north-central Maryland...

escarpment, a barrier ridge separating the flat highlands plateau, the Appalachian Plateau—from the many barrier ridges making up the local Ridge-and-Valley...

Virginia and Pennsylvania settlers how to cross the successive Allegheny barrier ridges via the Cumberland Narrows and the Nemacolin Trail—which Braddock Expedition...

flank of Broad Mountain in the Lehigh Valley. It connected across a barrier ridge whose waters originated in the saddle-pass where Hazleton was built...

Lehighton and Weiss Landing—on opposite banks of the River below the barrier ridge. The hamlet of Lausanne Landing anchored one end of the Lausanne-Nescopeck...

northern boundary, which is the over 150 miles (240 km)-long Blue Mountain barrier ridge. Its ten villages are Beersville, Copella, Dannersville, Delps, Emanuelsville...

A radiant barrier is a type of building material that reflects thermal radiation and reduces heat transfer. Because thermal energy is also transferred...

oceanography, geomorphology, and geoscience, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated...

part of the barrier between the colder bottom waters of the Arctic and the warmer waters of the North Atlantic. The Wyville Thomson Ridge is named after...

1-mile-long (1.8 km) single-track railway tunnel crossing under the barrier ridge of Nesquehoning Mountain between Lansford, Pennsylvania, in the Panther...

Broad Mountain may refer to: Broad Mountain (Lehigh Valley), a barrier ridge in Carbon County and Schuylkill County, Pennsylvania, U.S. Broad Mountain...

islands and reefs, as well as the world's largest reef system, the Great Barrier Reef (GBR), which was declared a World Heritage Site by UNESCO in 1981...

North Barrier is a narrow rock ridge which descends northward from Campbell Peak to Mount Separation, and then along the northwest flank of Compton Glacier...

sheltered lagoon which the reef protects from the open ocean. barrier ridge Any steep, unnavigable ridge or escarpment isolating one terrain from another. barrio...

assumed that this ridge continued to rise beyond the range of vision". The next day, the party made its first steps on the Barrier. "After half an hour's...

long-term geologic stability of the region, its long ridges and valleys which serve both as barrier and corridors, and their general north-south alignment...

project, the production facility located at the Clinton Engineer Works in Oak Ridge, Tennessee, the main gaseous diffusion building, and ultimately the site...

South Barrier (53°9′S 73°35′E / 53.150°S 73.583°E / -53.150; 73.583) is a rocky ridge descending southward from Budd Peak along the east margin of Fiftyone...

to 2.4 m) above sea level. The ridge is covered by sand, sometimes very thinly. The ridge has historically been a barrier to water flow from the Everglades...