North American Floor How Deep Off Washingon Coast

The wide flat and shallow shelf stretches 145 km from the shore to a water depth of 100 m.

North american floor how deep off washingon coast.

This is from a 2014 survey in deeper water. Brendan philip university of washington. The base of the column is 1 3 of a mile 515 meters deep and the top of the plume is at 1 10 of a mile 180 meters depth. It extends to alaska where the pacific north american plate boundary makes a 90 degree turn allowing the pacific plate to subduct beneath the north american plate at the aleutian trench.

Historically the northwest coast people inhabited a narrow belt of north american pacific coastland and offshore islands from the southern border of alaska to northwestern california. Most of the coast mountains are composed of granite which is part of the coast plutonic complex. But after years of detective work geologists have discovered that it can unleash mayhem on an epic scale. 1 3 mimics the landscape shown in cross section in fig.

In popular conception the gulf stream also includes the florida current between the straits of florida and cape. Off the georgia south carolina coast however the continental margin is anything but typical. Their world stretched from yakutat bay in the northeastern gulf of alaska south to cape mendocino in present day california. It features the deepest point in the atlantic ocean 27 493 feet.

Figure 1b shows a cross section or vertical profile of the 31 30 north latitude line. This is the. The giant underestimated earthquake threat to north america the enormous fault off the coast of the pacific northwest has been silent for three centuries. The world s longest trench 3 700 mi it is located on the boundary between the nazca plate and the.

Gulf stream warm ocean current flowing in the north atlantic northeastward off the north american coast between cape hatteras n c u s and the grand banks of newfoundland can. The locked zone varies in width from a few tens of kilometers km along the oregon coast to perhaps a hundred km or more off of washington s olympic peninsula and is about 1 000 km long. Notice that landscape along the oregon washington coast shown in fig. The range is approximately 1 600 km 1 000 mi long and 200 km 120 mi wide.

Trench located off the coast of puerto rico on the boundary between the south american and caribbean plates. Sonar image of bubbles rising from the seafloor off washington s coast. The coast mountains are the western range of the north american mainland cordillera covering the alaska panhandle and most of coastal british columbia.