The Pimple Hills are a

range Range may refer to: Geography * Range (geographic), a chain of hills or mountains; a somewhat linear, complex mountainous or hilly area (cordillera, sierra) ** Mountain range, a group of mountains bordered by lowlands * Range, a term used to i ...

of the

New York-New Jersey Highlands New is an adjective referring to something recently made, discovered, or created. New or NEW may refer to: Music * New, singer of K-pop group The Boyz (South Korean band), The Boyz Albums and EPs * New (album), ''New'' (album), by Paul McCartn ...

region of the

Appalachian Mountains The Appalachian Mountains, often called the Appalachians, (french: Appalaches), are a system of mountains in eastern to northeastern North America. The Appalachians first formed roughly 480 million years ago during the Ordovician Period. They ...

. The

summit A summit is a point on a surface that is higher in elevation than all points immediately adjacent to it. The topography, topographic terms acme, apex, peak (mountain peak), and zenith are synonymous. The term (mountain top) is generally used ...

, reaching a height of , lies within Sussex County, New Jersey.

Geography

The Pimple Hills lie between the Sparta Valley on the southeast, drained by the

Wallkill River The Wallkill River, a tributary of the Hudson, drains Lake Mohawk in Sparta, New Jersey, flowing from there generally northeasterly U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed Octo ...

, and Germany Flats to the northwest, a portion of the

Kittatinny Valley The Kittatinny Valley is a section of the Great Appalachian Valley in Sussex and Warren counties in northwestern New Jersey that is bounded on the northwest by Kittatinny Mountain, and in the southeast by the New Jersey Highlands region. The val ...

Geology

The Pimple Hills are part of the

Reading Prong The Reading Prong is a physiographic subprovince of the New England Uplands section of the New England province of the Appalachian Highlands. The prong consists of mountains made up of crystalline metamorphic rock. Location The Reading Prong st ...

of the New England Upland subprovince of the

New England province The New England province is a physiographic province of the larger Appalachian division of eastern North America. The province consists of the Seaboard Lowland, New England Upland, White Mountain, Green Mountain, and Taconic sections. Geology ...

of the Appalachian Highlands. The rocks that form the Pimple Hills are comprised from the same belt that make up other mountains nearby. This belt, i.e. the Reading Prong, consists of ancient crystalline

metamorphic rock Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causin ...

s. The New England province as a whole, along with the

Blue Ridge province Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when obse ...

further south, are often together referred to as the

Crystalline Appalachians A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macrosc ...

. The Crystalline Appalachians extend as far north as the

Green Mountains The Green Mountains are a mountain range in the U.S. state of Vermont. The range runs primarily south to north and extends approximately from the border with Massachusetts to the border with Quebec, Canada. The part of the same range that is in ...

Vermont Vermont () is a state in the northeast New England region of the United States. Vermont is bordered by the states of Massachusetts to the south, New Hampshire to the east, and New York to the west, and the Canadian province of Quebec to ...

and as far south as the

Blue Ridge Mountains The Blue Ridge Mountains are a physiographic province of the larger Appalachian Mountains range. The mountain range is located in the Eastern United States, and extends 550 miles southwest from southern Pennsylvania through Maryland, West Virgin ...

, although a portion of the belt remains below the Earth's surface through part of

Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...

. The Crystalline Appalachians are distinct from the parallel Sedimentary Appalachians which run from Georgia to New York. The nearby Kittatinny Mountains are representative of these sedimentary formations.

History

An 1834 description read,

References

{{Mountains of New Jersey Landforms of Sussex County, New Jersey Ridges of New Jersey