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The Little River Fault (see the QFFDB, Fault 556) is representative of an extensive zone of faults along the north side of the Olympic Peninsula and in the Strait of Juan de Fuca (likely connected with the fault systems at the south end of Vancouver Island, see fault database map), but these lie west of the crustal blocks that underlie the ...
The 1,600 kilometres (990 mi) [4] long Macquarie fault zone (also known as the Macquarie Ridge, its gazetted name since 2015, [7] the Macquarie Ridge complex or historically as the Macquarie Fault) [Notes 1] is a major right lateral-moving transform fault along the seafloor of the south Pacific Ocean which runs from New Zealand southwestward towards the Macquarie triple junction.
Map of the Chile Rise and its fracture zones in Nazca and the Antarctic plates Active Pacific Ocean fracture zones are perpendicular to the mid-ocean ridges (black lines) in orange shaded region. Since the map was prepared ages not shown of south-west Pacific and north Pacific Ocean floors may have been characterised.
The Pacific is ringed by many volcanoes and oceanic trenches. The Pacific Ocean evolved in the Mesozoic from the Panthalassic Ocean, which had formed when Rodinia rifted apart around 750 Ma. The first ocean floor which is part of the current Pacific plate began 160 Ma to the west of the central Pacific and subsequently developed into the ...
The Pacific Ring of Fire runs parallel to the line and is the world's foremost belt of explosive volcanism. The term andesite line predates the geologic understanding of plate tectonics . The term was first used in 1912 by New Zealand geologist Patrick Marshall to describe the distinct structural and volcanologic boundary extending from east of ...
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.
The section of the fault zone directly under "Seattle" corresponds to the red line in the photo at the top. (DGER [9]) One model of the Seattle Uplift: Cross-section (south to north) along the east side of central Puget Sound, looking west. TB = Tacoma Basin EPZ = East Passage Zone (Maury Island), SFZ = Seattle Fault Zone (Alki Point).
In 1940, Harold Wellman found that the Southern Alps were associated with a fault line approximately 650 km (400 miles) [a] long. [34] The fault was officially named the Alpine Fault in 1942 as an extension of a previously mapped structure. [5] At the same time, Harold Wellman proposed the 480 kilometres (300 mi) lateral displacement on the ...