![]() ![]() Spanish explorers found a way to explore the Pacific coast as early as 1565, sending vessels northeast from the Philippines, riding the Kuroshio Current in a sweeping circular route across the northern part of the Pacific. Soon the coast of Oregon became a valuable trading route to Asia.ġ601 AD map showing unexplored Oregon Coast Exploration was retaken routinely in 1774, starting by the expedition of frigate Santiago by Juan José Pérez Hernández (see Spanish expeditions to the Pacific Northwest). Stops along these trips included Oregon as well as the strait now bearing his name. In 1592, Juan de Fuca undertook detailed mapping and studies of ocean currents. ![]() The Spanish exploration team led by Juan Rodríguez Cabrillo sighted southern Oregon off the Pacific coast in 1543. Christian missionaries, and later immigrants planning to settle permanently in Oregon, sent glowing reports back to their families in the east. Fur traders and trappers, initially from the Hudson's Bay Company, explored the land more thoroughly, documenting encounters with most of the local Indian tribes. Official explorers came, at first, primarily by sea, in many cases seeking the Northwest Passage, and later over land, but missed many areas of the state now known as Oregon. The perception of Oregon by early European explorers and settlers varied according to the purpose and method of exploration. The eruption deposited ash as far into Oregon as Bend. Helens in nearby Washington erupted violently, temporarily reducing the Columbia River's depth to as little as 13 feet, and disrupting Portland's economy. The rapids were submerged in 1957 with the construction of The Dalles Dam. Native people traveled to Celilo Village from all over the Pacific Northwest and beyond to trade. Ĭelilo Falls, a series of rapids on the Columbia River just upstream of present-day The Dalles, Oregon, was a fishing site for natives for several millennia. The earthquake caused a tsunami that was destructive in Japan it may also be linked to the Bonneville Slide, in which a large part of Washington's Table Mountain collapsed into the Columbia River Gorge, damming the river and forming the Bridge of the Gods, a land bridge remembered in the oral history of local Native Americans. ![]() The 1700 Cascadia earthquake resulted from a rupture at the Cascadia subduction zone along the coast of the Pacific Northwest. After the mountain destroyed itself the Klamaths recounted the events as a great battle between Llao and his rival Skell, their sky god. The Klamath Native Americans of the area thought that the mountain was inhabited by Llao, their god of the underworld. Mazama's collapsed caldera, in today's southern Oregon, contains Crater Lake, and the entire mountain is located in Crater Lake National Park. Helens, reduced Mazama's approximate 11,000-foot (3,400 m) height by around half a mile (about 1 km) when much of the volcano fell into the volcano's partially emptied neck and magma chamber. The eruption, estimated to have been 42 times more powerful than the 1980 eruption of Mount St. Mount Mazama, once the tallest mountain in the region at 11,000 feet, had a massive volcanic eruption approximately 5677 B.C. They also formed many unusual geological features, such as the channeled scablands of eastern Washington. The floods' periodic inundation of the lower Columbia River Plateau deposited rich lake sediments, establishing the fertility that supports extensive agriculture in the modern era. Water levels during the Missoula Floods have been estimated at 1,250 feet (380 m) at the Wallula Gap (in present-day Washington), 830 feet (250 m) at Bonneville Dam, and 400 feet (120 m) over current day Portland, Oregon. The periodic rupturing of ice dams at Glacial Lake Missoula resulted in discharge rates ten times the combined flow of all the rivers of the world, as many as forty times over a thousand-year period. The Columbia River and its drainage basin experienced some of the world's greatest known floods toward the end of the last ice age. In the Pleistocene era (the last ice age, two million to 700,000 years ago), the Columbia River broke through Cascade Range, forming the Columbia River Gorge. Volcanic activity in the region has been traced to 40 million years ago, in the Eocene era, forming much of the region's landscape. ![]() Main article: Geology of the Pacific Northwest Mount Mazama erupted several millennia BC, leading to the formation of Crater Lake. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |