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  2. Puget Sound faults - Wikipedia

    en.wikipedia.org/wiki/Puget_Sound_faults

    These bends are located where they intercept a "subtle geological structure" [202] of "possible fundamental importance", [203] a NNE striking zone (line "A" on the map) of various faults (including the Tokul Creek Fault NNE of Snoqualmie) and early-Miocene (about 24 Ma) volcanic vents and intrusive bodies (plutons and batholiths) extending from ...

  3. Fault (geology) - Wikipedia

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

    Faults may also displace slowly, by aseismic creep. [2] A fault plane is the plane that represents the fracture surface of a fault. A fault trace or fault line is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. [3] [4]

  4. Great Lakes tectonic zone - Wikipedia

    en.wikipedia.org/wiki/Great_Lakes_Tectonic_Zone

    This map shows the locations of the Superior province, Penokean orogeny, Minnesota River Valley subprovince, Great Lakes tectonic zone (Minnesota's portion) and the present-day location of the Wyoming province. Early Archean rocks generally form elongate, domal or circular bodies that are several kilometers thick.

  5. Cascadia subduction zone - Wikipedia

    en.wikipedia.org/wiki/Cascadia_subduction_zone

    The Cascadia subduction zone is a 960 km (600 mi) fault at a convergent plate boundary, about 100–200 km (70–100 mi) off the Pacific coast, that stretches from northern Vancouver Island in Canada to Northern California in the United States

  6. Geology of the United States - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_United_States

    Shaded relief map of the United States, showing 10 geological provinces. The richly textured landscape of the United States is a product of the dueling forces of plate tectonics, weathering and erosion. Over the 4.5 billion-year history of the Earth, tectonic upheavals and colliding plates have raised great mountain ranges while the forces of ...

  7. What the New Jersey earthquake tells us about the fault ... - AOL

    www.aol.com/news/jersey-earthquake-tells-us...

    The USGS maintains several monitoring instruments around the country for known fault lines and volcanos. Data from these measurements is transmitted in real-time to researchers in California.

  8. What is the Almanor Fault Zone? Geologist explains region ...

    www.aol.com/news/almanor-fault-zone-geologist...

    A map by the California Geological Survey shows faults near the Lake Almanor area in Plumas County, where a magnitude 5.5 earthquake struck Thursday, May 11, 2023, followed by a magnitude 5.2 ...

  9. Which parts of Stanislaus County are most at risk for ... - AOL

    www.aol.com/news/parts-stanislaus-county-most...

    The earthquakes this week were located slightly north of the Ortigalita fault, in an area without any mapped fault lines at the surface, she said. “These earthquakes, of course, occurred some ...