The Northeast Pacific Ocean and Margin

Riddihough, R. P.

doi:10.1007/978-1-4615-8041-6_2

Cited by 6 publications

(3 citation statements)

References 99 publications

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“…This NH to SE trending zone of active convergence ultimately gives way to transform faulting in the northeasterly direction at the point where the Explorer Ridge spreading centre confronts the Pacific, America and Explorer Plates to create a ridge-trench transform triple junction. Estimates of rates of movement along the plate boundaries range from 10-60 mm per year and large magnitude earthquakes are a frequent occurrence, Riddihough [9].…”

Section: The Fraser Delta Problem 41 Continental Margin Of Hestern Ca...mentioning

confidence: 99%

Seabed Stability Evaluation Studies Using Shear Wave Propagation Phenomena

DAVIS,

CHRISTIAN,

HUWS

et al. 2024

Acoustic Classification and Mapping of the Seabed 1993

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Section: The Fraser Delta Problem 41 Continental Margin Of Hestern Ca...mentioning

confidence: 99%

Seabed Stability Evaluation Studies Using Shear Wave Propagation Phenomena

DAVIS,

CHRISTIAN,

HUWS

et al. 2024

Acoustic Classification and Mapping of the Seabed 1993

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“…Relative movement along the fault has been calculated at 50-60 mm/year (Riddihough 1988). Consequently, this is a region of elevated seismicity with Canada's largest earthquake (magnitude 8.1) recorded off the northwestern coast of the Queen Charlotte Islands in 1949.…”

Section: Regional Settingmentioning

confidence: 99%

Evolution of a nearshore and coastal macrotidal sand transport system, Queen Charlotte Islands, Canada

Barrie¹,

Conway²

1996

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“…The majority of them occur in northern and central California, in Ocean. Suspect terranes were actively accumulating along the east Pacific Ocean margin (Riddihough 1988). Oceancrust production and extensive volcanism occurred during the "middle" Cretaceous (Skelton et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Late Cretaceous endemic shallow-marine gastropod genera of the northeast Pacific: biodiversity and faunal changes

Squires¹

2018

PaleoBios

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Endemic genera of shallow-marine gastropods in the Cretaceous Northeast Pacific Subprovince (NEP), extending from Alaska to northern Baja California Sur, Mexico, are tabulated and discussed in detail for the first time. None are known in Lower Cretaceous or Cenomanian strata, but 43 genera, nearly twothirds of which are neogastropods, are recognized in Upper Cretaceous strata. Their first appearance was at the beginning of the Turonian, which coincided with the warmest time of the Cretaceous and one of its highest sea-level stands. Fourteen new subtropical endemic genera appeared then, and 10 (71%) were neogastropods. Tethyan-influenced thermophilic mollusks (nerineid, acteonellid, neritid, and cypraeoidean gastropods, as well as rudistid bivalves) were present. A turnover at the Turonian/Coniacian boundary occurred when cooler waters migrated southward, resulting in the subtropical endemics being abruptly and nearly completely replaced by 10 warm-temperate new endemic neogastropods, which commonly had long-living lineages persisting through the Campanian or early Maastrichtian. Eight (80%) of these new genera were neogastropods. During these cooler water times in the Coniacian and nearly all of the Santonian, there was an absence ("gap") of Tethyan-influenced and other thermophile mollusks. New endemic genera, were added during an origination event in the early Campanian and also during another one in the late Campanian. Fewer and fewer new neogastropod genera appeared during each of these origination events, whereas new endemic genera of non-neogastropods increased. Rudistids and thermophilic mollusks also returned in the Campanian. Most of the post-Turonian endemic genera went extinct at a turnover at the end of the early Maastrichtian (="Middle Maastrichtian Event"), rather than at the K/Pg boundary mass-extinction event. Two new endemic genera, both neogastropods, originated just before the end of the Maastrichtian. They and three other Cretaceous endemic gastropod genera occur also in the NEP Cenozoic record, thereby imparting a somewhat transitional aspect between these two faunas. The tectonically transported fauna of the middle Albian Alisitos Formation in northern Baja California, Mexico is confirmed to have lived in the tropical-water Caribbean Biotic Province of the Tethyan Realm.

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The Northeast Pacific Ocean and Margin

Cited by 6 publications

References 99 publications

Seabed Stability Evaluation Studies Using Shear Wave Propagation Phenomena

Seabed Stability Evaluation Studies Using Shear Wave Propagation Phenomena

Evolution of a nearshore and coastal macrotidal sand transport system, Queen Charlotte Islands, Canada

Late Cretaceous endemic shallow-marine gastropod genera of the northeast Pacific: biodiversity and faunal changes

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