known indian dialect isolated major composite state washington located volcano visible west seattle north higher areas eastern suburbs vancouver volcano fourth tallest peak washington state known compared area local native americans recognized washington histories stories foreign explorers reached region learned basic information surrounding initially understand volcano positioned volcano miles northeast seattle volcano closer seattle set farther feet shorter noticeable active washington volcano formed pleistocene million years ago recent ice age produced largest explosive state continental ice sheets retreated region began regularly times past years erupted repeatedly periods largest washington geology remnants past prehistoric lava main components summit volcano addition false summit past flow deposits easily visible river valleys near volcano likely caused lava dome collapse ridges found east summit consisting ash cloud remains western flank volcano deposit runs kilometres white river valley years ago flow deposits visible identified relatively years old considerably newer years old covers area kilometres river valley small incidents years old unidentified age rich continued kilometres ash cloud deposits opposite eastern flank volcano studies mountain date unable find correspondence flows past identified located mountain kilometres thick containing flow deposits large metres thick concentration past incidents volcano spans dusty chocolate creek area cubic kilometers debris contained deposits constrained left flank volcano past incidents identified form layers constructing mountain smaller involving occurred years ago years ago recent years ago mountain additional indian pass located volcano caused thermal events hot springs hot springs mountain gamma kennedy destroyed buried slide setting volcano located washington major situated volcano created oceanic convergence continues rate centimetres year range active million years rocks million years old range irregular occur attempt organize age scientists typically divide younger consisting older washington different ages included sections history area native americans washington mountain recognized spirit european american explorers reached area learned mountain partially local legends local people described vital storytelling beliefs area mapped left natives mentioned volcano naturalist saying volcano smoked volcano finally documented map native americans area agriculture leading region result gold miners eventually reached area searching resources rich land white man recorded observe mountain employee searching possible railroad routes saw history despite elevation feet small relatively high summit consequence location atop high ridge volcanic portion extends feet underlying ridge cascade arc volcano similar southwestern british_columbia canada situated ridge rock major washington large past years generate origin builds flow vent gradually pressure grows culminating explosion materials simplest form ash dating indicate occurred years years years years volcanic index small compared eruption characterized mainly central vent eruption followed explosive eruption varied outcome produced flows lava little years ago sequence occurred period years associated flows mixed snow ice water formed raced nearby rivers filling valleys deep deposits subsequently drained time outlet arlington miles downstream deposited seven feet sediment subsequent erosion deposits near led current river system separated debris deposited way sound small portion erupted deposited locally reached higher levels atmosphere transported wind hundreds miles deposits congregation thick foot near inches near montana events produced largest events years ago associated dome building cases traveled hazards reach populated areas bury structures people example tragedy del died enormous pose similar threat small communities lesser threat larger rapidly growing towns communities lower study conducted survey identified cascade including high threat inadequate monitoring time study installed worked years glaciers significant glaciers cover saw glaciers beginning retreat advanced average retreat glaciers positions feet noted glaciers began advance early 1950s years rapid retreat advance response sharp rise winter precipitation decline summer temperature beginning glaciers advanced including glaciers directly mountain slopes advances glaciers ranged feet culminated glaciers advanced period identifiable maximum advance terminal average retreat glaciers recent maximum positions feet milk lake north flank mountain melted away altogether 1990s recreation passes near crossing known feature passes area crossing bridge crossing flooded storms late person climb mountain group scientists volcano available reach mountain takes miles walking white river trail reached road mainly slopes consist black diamonds ascent descent
Glacier Peak