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  2. Midcontinent Rift System - Wikipedia

    en.wikipedia.org/wiki/Midcontinent_Rift_System

    The Midcontinent Rift System (MRS) or Keweenawan Rift is a 2,000 km (1,200 mi) long geological rift in the center of the North American continent and south-central part of the North American plate. It formed when the continent's core, the North American craton , began to split apart during the Mesoproterozoic era of the Precambrian , about 1.1 ...

  3. Crowley's Ridge - Wikipedia

    en.wikipedia.org/wiki/Crowley's_Ridge

    The flora and fauna of the ridge seem more closely related to the Tennessee hills to the east than to the Ozark Mountains to the west. This unique habitat has been protected by the establishment of several state and city parks, the St. Francis National Forest, recreational lakes, and in 1997 a national scenic byway, the Crowley's Ridge Parkway.

  4. List of fossiliferous stratigraphic units in Arkansas - Wikipedia

    en.wikipedia.org/wiki/List_of_fossiliferous_str...

    This article contains a list of fossil-bearing stratigraphic units in the state of Arkansas, U.S. Sites. Group or Formation Period Notes Annona Chalk: Cretaceous:

  5. Geology of Arkansas - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Arkansas

    Oil exploration began in earnest in 1916 with an unsuccessful well east of El Dorado, in Union County (which at the time was known as Urbana County). A week after Samuel S. Hunter found modest amounts of oil in the Hunter No. 1 well near Stephens, Arkansas, the Constantin Oil and Refining Company found large amounts of oil and natural gas. Soon ...

  6. New Madrid seismic zone - Wikipedia

    en.wikipedia.org/wiki/New_Madrid_Seismic_Zone

    The New Madrid seismic zone (NMSZ), sometimes called the New Madrid fault line (or fault zone or fault system), is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the Southern and Midwestern United States, stretching to the southwest from New Madrid, Missouri.

  7. Archaeologists Think They Might Have Found the Real Noah’s Ark

    www.aol.com/lifestyle/archaeologists-think-might...

    Researchers now believe they’ve found evidence of human activity near the boat-shaped formation in the mountains from between 5500 and 3000 BC. Faruk Kaya, AICU vice rector professor, ...

  8. Plum Bayou Mounds Archeological State Park - Wikipedia

    en.wikipedia.org/wiki/Plum_Bayou_Mounds...

    The people who built the mounds at Plum Bayou Mounds had a culture distinct from other contemporary Native American groups in the Mississippi Valley. Plum Bayou sites are found throughout the White River and Arkansas River floodplains of central and eastern Arkansas, but are also found as far west as the eastern Ozark Mountains. Plum Bayou ...

  9. Rare predator with missing teeth is mysteriously found dead ...

    www.aol.com/rare-predator-missing-teeth...

    They could once be found all throughout Arkansas, but had more-or-less vanished by 1920, the Commission said, but there have been 23 confirmed sightings in the state beginning in 2010.