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Lamb waves propagate in solid plates or spheres. [1] They are elastic waves whose particle motion lies in the plane that contains the direction of wave propagation and the direction perpendicular to the plate. In 1917, the English mathematician Horace Lamb published his classic analysis and description of acoustic waves of this type. Their ...
Northward propagation of the East Pacific Rise into the North American plate initiates rifting off of the Baja California peninsula. 4 Ma Pliocene Sierra Nevada begins to rise. 3.5 Ma Pliocene The Pacific plate changes its direction of motion about 11 degrees east of its previous heading, from northwest to the present northwest by north.
Making North America is a 2015 American documentary film which premiered nationwide on November 4, 2015. [1] The PBS Nova film, comprising three episodes of one hour each, was hosted by Kirk Johnson (Director of the Smithsonian National Museum of Natural History); Peter Oxley directed the first episode while Gwyn Williams directed the second and third.
The migration was due to a combination of jumps, asymmetric spreading, and segment propagation. [2] This model implies that the Queen Charlotte fault is lengthening to the south, while fragmenting the Explorer plate. Furthermore, this means that the Explorer plate is most likely being captured by the Pacific plate. [2]
Atwater is perhaps best known for her work on the plate tectonic history of western North America. [12] She wrote two major research papers outlining the history of plate tectonic evolution of North America and tectonic problems of the San Andreas Fault, which assisted in documenting the history of the San Andreas Fault. [13] [14]
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Goat Cheese, Pecan, and Mixed Green Salad. This premade salad consists of mixed greens, pecans, dried cranberries, bell peppers, tomatoes, red onions, and goat cheese with a honey vinaigrette. The ...
Keshon Gilbert scored 16 points, grabbed 10 rebounds and dished five assists as No. 3 Iowa State pulled away from No. 25 Baylor 74-55 in a Big 12 Conference showdown Saturday in Ames, Iowa.