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26-475: The first person in recorded history to scale the summit of Lone Peak was Richard Bell, Sr. of Riverton, Utah. Bell also led the first recorded climb of the Lone Peak Cirque. He went on to lead several expeditions and taught many alpine guides. Bells Canyon is named for him and is still a common route to the summit. Lone Peak consists almost entirely of quartz monzonite (a granitoid or granite -like rock) of

52-407: A period of crystallization that may be very distinct or may have coincided with or overlapped the period of formation of some of the other ingredients. Earlier crystals originated at a time when most of the rock was still liquid and are more or less perfect. Later crystals are less regular in shape because they were compelled to occupy the spaces left between the already-formed crystals. The former case

78-460: A small cabin in a meadow. The route gains altitude in the beginning, going through a steep scrub oak section. After a few hours of hiking, the trail levels off and veers north into the trees crossing the water of cold springs in Bear Canyon. The trail climbs out of the drainage on the north side into a new drainage, but stays generally below the ridgeline. The trail eventually opens into a meadow with

104-400: A small cabin in the large pine trees. The trail continues up above the cabin to the southeast and crosses over to the south into another drainage at a low point on the ridge. The southeast top of the new drainage meets up with the main granite drainage running roughly north-south which leads to the Lone Peak Cirque via stacked rock cairns. An alternate route is to follow the approximate course of

130-706: Is a large quartz monzonite monadnock . Quartz monzonite extracted from a quarry in Little Cottonwood Canyon was used to build several buildings in Salt Lake City , Utah , including the Church of Jesus Christ of Latter-day Saints ' Salt Lake Temple , Church Administration Building , and Conference Center , as well as the Utah State Capitol . The large boulders of Joshua Tree National Park in southern California are quartz monzonite. A large pluton in

156-499: Is common in lavas but very rare in plutonic rocks. Muscovite is confined to intrusions. These differences show the influence of the physical conditions under which crystallization takes place. Hypabyssal rocks show structures intermediate between those of extrusive and plutonic rocks. They are very commonly porphyritic, vitreous , and sometimes even vesicular . In fact, many of them are petrologically indistinguishable from lavas of similar composition. Plutonic rocks form 7% of

182-408: Is described as miarolitic texture . Because their crystals are of roughly equal size, intrusive rocks are said to be equigranular . Plutonic rocks are less likely than volcanic rocks to show a pronounced porphyritic texture, in which a first generation of large well-shaped crystals are embedded in a fine-grained ground-mass. The minerals of each have formed in a definite order, and each has had

208-414: Is located near a large turnout on the right side of the road and is marked with a sign. Several other hiking and mountain biking trails start from the same parking area, and three four-wheel drive tracks climb the road bank on the north side of the road; a wooden fence leads to the starting point of the trail. A major section of the trail, climbing from the lower two-track roads to the meadow below Ennis Peak,

234-571: Is now deprecated. Quartz monzonite porphyry is often associated with copper mineralization in the porphyry copper ore deposits. In the White Mountains and western highlands of New Hampshire , the Kinsman Quartz Monzonite is an extensive formation that underlies Kinsman Mountain , parts of Franconia Notch , Mount Cardigan , and Mount Sunapee . Stone Mountain in Georgia

260-553: Is one of the two ways igneous rock can form. The other is extrusion , such as a volcanic eruption or similar event. An intrusion is any body of intrusive igneous rock, formed from magma that cools and solidifies within the crust of the planet . In contrast, an extrusion consists of extrusive rock, formed above the surface of the crust. Some geologists use the term plutonic rock synonymously with intrusive rock, but other geologists subdivide intrusive rock, by crystal size, into coarse-grained plutonic rock (typically formed deeper in

286-499: Is only 5–20% quartz. Rock with less than five percent quartz is classified as monzonite . A rock with more alkali feldspar is a syenite whereas one with more plagioclase is a quartz diorite . The fine grained volcanic rock equivalent of quartz monzonite is quartz latite . The term adamellite was originally applied by A. Cathrein in 1890 to orthoclase-bearing tonalite (likely a granodiorite ) at Monte Adamello, Italy, in 1890, but later came to refer to quartz monzonite. The term

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312-421: Is partially hidden by large trees. In October 1997, a family from Draper was caught in a blinding snow storm and took shelter in the cabin until they were rescued. There is a journal in the cabin that visitors can add their stories to. Quartz monzonite Quartz monzonite is an intrusive , felsic , igneous rock that has an approximately equal proportion of orthoclase and plagioclase feldspars . It

338-401: Is said to be idiomorphic (or automorphic ); the latter is xenomorphic . There are also many other characteristics that serve to distinguish plutonic from volcanic rock. For example, the alkali feldspar in plutonic rocks is typically orthoclase , while the higher-temperature polymorph, sanidine , is more common in volcanic rock. The same distinction holds for nepheline varieties. Leucite

364-415: Is typically a light colored phaneritic (coarse-grained) to porphyritic granitic rock. The plagioclase is typically intermediate to sodic in composition, andesine to oligoclase. Quartz is present in significant amounts. Biotite and/or hornblende constitute the dark minerals. Because of its coloring, it is often confused with granite , but whereas granite contains more than 20% quartz, quartz monzonite

390-483: The Earth's crust in batholiths or stocks ) and medium-grained subvolcanic or hypabyssal rock (typically formed higher in the crust in dikes and sills). Because the solid country rock into which magma intrudes is an excellent insulator, cooling of the magma is extremely slow, and intrusive igneous rock is coarse-grained ( phaneritic ). However, the rate of cooling is greatest for intrusions at relatively shallow depth, and

416-1106: The QAPF diagram . Dioritic and gabbroic rocks are further distinguished by whether the plagioclase they contain is sodium -rich, and sodium-poor gabbros are classified by their relative contents of various iron - or magnesium -rich minerals ( mafic minerals) such as olivine , hornblende , clinopyroxene , and orthopyroxene, which are the most common mafic minerals in intrusive rock. Rare ultramafic rocks , which contain more than 90% mafic minerals, and carbonatite rocks, containing over 50% carbonate minerals, have their own special classifications. Hypabyssal rocks resemble volcanic rocks more than they resemble plutonic rocks, being nearly as fine-grained, and are usually assigned volcanic rock names. However, dikes of basaltic composition often show grain sizes intermediate between plutonic and volcanic rock, and are classified as diabases or dolerites. Rare ultramafic hypabyssal rocks called lamprophyres have their own classification scheme. Intrusive rocks are characterized by large crystal sizes, and as

442-416: The 30.5 million-year-old Little Cottonwood Stock. Quartzite and limestone are also found in distal locations on the mountain. The high mountain ridge stretching from Little Cottonwood Canyon on the northern end to Corner Canyon on the southern end is sometimes called "Mount Jordan", the highest peak of which is Lone Peak. Nearby peaks include Ennis Peak and Big Horn Peak. Lone Peak ranks 98th by elevation on

468-458: The Allen Brothers and Alan Summerhays. Construction was completed in 1967 prior to the area being designated a wilderness area. The cabin has three cots, a potbelly stove, cabinets, and two small windows. It is built from trees downed in the area and the roof is lined with plastic and dirt/grass for insulation. All the materials besides the trees were hauled to the location by horseback. The cabin

494-704: The Atlanta lobe of the Idaho Batholith , near McCall , Idaho , is made of quartz monzonite. The Guilford Quartz Monzonite and Woodstock Quartz Monzonite , probably comagmatic, are located in central Maryland . In Queensland , Castle Hill, Mount Stuart and Mount Louisa around Townsville represent a large quartz monzonite province. Intrusive rock Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form intrusions , such as batholiths , dikes , sills , laccoliths , and volcanic necks . Intrusion

520-473: The Jacob's Ladder Trail. There are a few streams along the routes which tend to dry up before summer, so water must be carried along. There is reportedly a spring that runs year-round. The shortest and arguably the most popular route is the Jacob's Ladder Trail, which begins at a trailhead located at 40°29′39″N 111°48′59″W  /  40.49417°N 111.81639°W  / 40.49417; -111.81639 . It

546-507: The bottom, thick undergrowth prevents passage. The Jacob's Ladder Trailhead is just up the road. The Jacob's Ladder Trail and the Draper Ridge Trail eventually merge, sharing the same trail for the last two-thirds of the route. Important features of this trail are that it has a year-round spring (cold springs) located at 40°30′58″N 111°47′35″W  /  40.51611°N 111.79306°W  / 40.51611; -111.79306 and

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572-448: The individual crystals are visible, the rock is called phaneritic . There are few indications of flow in intrusive rocks, since their texture and structure mostly develops in the final stages of crystallization, when flow has ended. Contained gases cannot escape through the overlying strata, and these gases sometimes form cavities , often lined with large, well-shaped crystals. These are particularly common in granites and their presence

598-407: The list of Utah peaks with at least 500 feet (150 m) of topographic prominence . There are several popular routes to reach the summit of Lone Peak, with different distances and starting elevations. The most common routes approach the peak from the south. It is possible to reach the summit in one long day, but rock climbers often camp at the base of the summit and non-climbers often camp lower on

624-685: The rock in such intrusions is often much less coarse-grained than intrusive rock formed at greater depth. Coarse-grained intrusive igneous rocks that form at depth within the Earth are called abyssal or plutonic while those that form near the surface are called subvolcanic or hypabyssal . Plutonic rocks are classified separately from extrusive igneous rocks, generally on the basis of their mineral content. The relative amounts of quartz , alkali feldspar , plagioclase , and feldspathoid are particularly important in classifying intrusive igneous rocks, and most plutonic rocks are classified by where they fall in

650-418: The streambed up the drainage until the top of the ridge that runs roughly north-south above a granite drainage is reached. Round-trip mileage is about 16 miles with 6,876 feet of vertical gain. The Outlaw Cabin, located at 40°31′12″N 111°46′53″W  /  40.52000°N 111.78139°W  / 40.52000; -111.78139 on the southwest side of a meadow, was constructed in the summer of 1960 by

676-417: Was rebuilt in 2022, adding several miles to the round-trip hiking distance but substantially decreasing the steep grade of the previous trail by introducing numerous switchbacks. Round-trip mileage is about 15.6 miles, with approximately 5,603 feet of vertical gain. The Draper Ridge Trail is currently inactive. The trail is in a deteriorated condition, as the top of the trail is very exposed to weather. Towards

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