Search results
Results from the WOW.Com Content Network
The name "Cascadia" was first applied to the whole geologic region by Bates McKee in his 1972 geology textbook Cascadia; the geologic evolution of the Pacific Northwest. Later the name was adopted by David McCloskey, a Seattle University sociology professor, to describe it as a bioregion. McCloskey describes Cascadia as "a land of falling waters."
Cascadia Cave is nearby. The cave is an 8,000-year-old American Indian petroglyph site considered to have the largest concentration of rock engravings in western Oregon. [3] Willamette Valley settlers developed a bypass at the park site for horse-drawn wagons. Old wagon ruts are still visible near where Soda Creek meets the South Santiam River. [2]
From Astoria Canyon's mouth, the fan extends about 100 kilometres (62 mi) to its western end, which is the Cascadia Channel. The fan proper ends 160 kilometres (99 mi) south of the canyon mouth, although its depositional basin extends southward another 150 kilometres (93 mi) to the Blanco fracture zone. [1] Astoria Fan is generally asymmetrical.
On the academic side, there are engineering camps, biology camps, Makerspace camps, geology camp and more. The biology camp is for kids 12 to 18 and will be from 9 a.m. to 3 p.m. June 24-27.
Jun. 21—Making maps, hiking, exploring the geology around them and making a seismometer are among the things kids in University of Texas Permian Basin's Geology Camp have learned about this week.
Structure of the Cascadia subduction zone. The Cascadia subduction zone is a 1,000 km (620 mi) long dipping fault that stretches from Northern Vancouver Island to Cape Mendocino in northern California. It separates the Juan de Fuca and North America plates. New Juan de Fuca plate is created offshore along the Juan de Fuca Ridge.
The Cascadia subduction zone is capable of producing megathrust earthquakes on the order of MW 9.0. Due to the relative plate motions, the triple junction has been migrating northwards for the past 25–30 million years, and assuming rigid plates, the geometry requires that a void, called slab window, develop southeast of the MTJ. [4]
Scientists say that the Cascadia subduction zone off the coast of the Pacific Northwest has the potential to spark a magnitude-9.0+ earthquake, plus a subsequent tsunami. That scenario last ...