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==Park features== {{stack| [[File:Crater Lake Comfort Station 4 1941.jpg|thumb|[[Comfort Station No. 72|Comfort Station Number 4]].]] [[File:Pinnacles1.jpg|thumb|The Pinnacles.]] }} * The [[Pumice Desert]]: A very thick layer of [[pumice]] and ash leading away from Mazama in a northerly direction. Even after thousands of years, this area is largely devoid of plants due to excessive porosity (meaning water drains through quickly) and poor soil composed primarily of [[regolith]]. * The Pinnacles: When the very hot ash and pumice came to rest near the volcano, it formed {{convert|200|to|300|ft|-1|adj=mid|-thick}} gas-charged deposits. For perhaps years afterward, hot gas moved to the surface and slowly cemented ash and pumice together in channels and escaped through [[fumarole]]s. [[Erosion]] later removed most of the surrounding loose ash and pumice, leaving tall pinnacles and spires. * [[Mount Scott (Klamath County, Oregon)|Mount Scott]] is a steep [[andesite|andesitic]] cone whose [[lava]] came from [[magma]] from Mazama's [[magma chamber]]; geologists call such volcano a [[parasitic cone|parasitic]] or satellite cone. Volcanic eruptions apparently ceased on Scott sometime before the end of the [[Pleistocene]]; one remaining large [[cirque (landform)|cirque]] on Scott's northwest side was left unmodified by post-[[ice age|ice-age]] volcanism. * In the southwest corner of the park stands [[Union Peak]], an extinct volcano whose primary remains consist of a large volcanic plug, which is lava that solidified in the volcano's neck. * Crater Peak is a [[shield volcano]] primarily made of andesite and [[basalt]] lava flows topped by andesitic and [[dacite]] tephra. * Timber Crater is a shield volcano located in the northeast corner of the park. Like Crater Peak, it is made of basaltic and andesitic lava flows but, unlike Crater, it is topped by two cinder cones. * [[Rim Drive]] is the most popular road in the park; it follows a scenic route around the caldera rim. * Llao Rock on the north side rises {{convert|1800|ft}} above the lake, with a {{convert|1.3|mi|km|adj=mid}} trail from Rim Drive leading to the summit.<ref>{{cite news|last=Richard|first=Terry|title=Llao Rock offers unsurpassed first-time viewing opportunity of Crater Lake|url=http://blog.oregonlive.com/terryrichard/2011/09/llao_rock_offers_unsurpassed_f.html|access-date=January 8, 2012|newspaper=The Oregonian|date=September 14, 2011}}</ref> * The [[Pacific Crest Trail]], a {{convert|2650|mi|adj=mid}} long-distance hiking and equestrian trail that stretches from the Mexican to Canadian borders, passes through the park. * [[Old-growth forest]]s covering {{convert|50000|acre|ha sqmi km2}}.<ref name = "1993OldGrowthEstimates">{{Cite web | last1 = Bolsinger | first1 = Charles L. | last2 = Waddell | first2 = Karen L. | date = 1993 | title = Area of old-growth forests in California, Oregon, and Washington | url = http://www.fs.fed.us/pnw/pubs/pnw_rb197.pdf | publisher = [[United States Forest Service]], Pacific Northwest Research Station | id = Resource Bulletin PNW-RB-197 | access-date = March 14, 2012 }}</ref> {{clear}} {{Wide image|Craterlake-panorama.jpg|1778px|180-degree panoramic photograph of Crater Lake from the top of nearby [[Mount Scott (Klamath County, Oregon)|Mount Scott]], looking west. Two snow-covered peaks can be seen in the distance: to the right of the lake is [[Mount Thielsen]], and in the far left of the photo is [[Mount McLoughlin]].}}
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