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  2. Geology of Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Pennsylvania

    The proposal however, was not approved by the state legislature. [4] [5] Pennsylvania is also home to the famous Drake Oil Well in Titusville which helped give rise to the modern oil industry and two brand name motor oils, Quaker State (now owned by Royal Dutch Shell) and Pennzoil. Pennsylvania also has reserves of natural gas from both deeply ...

  3. Catskill Group - Wikipedia

    en.wikipedia.org/wiki/Catskill_Group

    Western Pennsylvania's petroleum was formed as a consequence. This was the first major oil region to be developed. This was the first major oil region to be developed. The Catskill was once considered to be related to the Old Red Sandstone , but in actuality, the two are only coincidentally similar.

  4. Pennsylvanian (geology) - Wikipedia

    en.wikipedia.org/wiki/Pennsylvanian_(geology)

    Arthropleura, a giant millipede, was a common sight and the giant griffinfly Meganeura "flew the skies". [7] It is commonly considered that is because of high oxygen level, however some of those large arthropod records are also known from period with relatively low oxygen, which suggest high oxygen pressure may not have been a primary reason ...

  5. Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania

    Pennsylvania is the fifth-most populous state in the United States, with over 13 million residents as of the 2020 United States census, its highest decennial census count ever. [3] The state is the 33rd-largest by area and has the ninth-highest population density among all states.

  6. Outline of Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/Outline_of_Pennsylvania

    An enlargeable map of the Commonwealth of Pennsylvania. Names Common name: Pennsylvania. Pronunciation: / ˌ p ɛ n s əl ˈ v eɪ n i ə,-s ɪ l ˈ-/ ⓘ Official name: Commonwealth of Pennsylvania (also known as the state of Pennsylvania) Abbreviations and name codes Postal symbol: PA; ISO 3166-2 code: US-PA; Internet second-level domain: .pa ...

  7. List of the prehistoric life of Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/List_of_the_prehistoric...

    This list of the prehistoric life of Pennsylvania contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Pennsylvania. Precambrian [ edit ]

  8. Hardyston Quartzite - Wikipedia

    en.wikipedia.org/wiki/Hardyston_Quartzite

    The Cambrian Hardyston Formation or Hardyston Quartzite is a mapped bedrock unit in Pennsylvania and New Jersey. It was originally described by Wolff and Brooks in 1898, [ 1 ] where two outcrops in Hardyston Township , Sussex County, New Jersey , were described.

  9. Northkill Amish Settlement - Wikipedia

    en.wikipedia.org/wiki/Northkill_Amish_Settlement

    The first Amish began migrating to the United States in the 18th century, largely to avoid religious persecution and compulsory military service. The Northkill Creek watershed, in eastern Province of Pennsylvania , was opened for settlement in 1736 and that year Melchior Detweiler and Hans Seiber settled near Northkill. [ 1 ]