Sinking Ship (Grand Canyon) facts for kids

Quick facts for kids Sinking Ship
Sinking Ship, aka Three Castles
Highest point
Elevation	7,344 ft (2,238 m)
Prominence	304 ft (93 m)
Isolation	2.30 mi (3.70 km)
Parent peak	Grandview Benchmark (7,530 ft)
Geography
Sinking Ship Location in Arizona Show map of Arizona Sinking Ship Location in the United States Show map of the United States
Location	Grand Canyon National Park Coconino County, Arizona, US
Parent range	Coconino Plateau Colorado Plateau
Topo map	USGS Grandview Point
Type of rock	limestone, sandstone, mudstone
Climbing
Easiest route	class 4 scrambling

Sinking Ship is a 7,344-foot (2,238 m) elevation summit located in the Grand Canyon, in Coconino County of northern Arizona, United States. This butte is situated 1.7 miles (2.7 km) southeast of the Grandview Point overlook on the canyon's South Rim, and 1.25 miles (2.01 km) southwest of Coronado Butte. Topographic relief is significant as it rises 4,800 feet (1,500 m) above the Colorado River in 4 miles (6.4 km). According to the Köppen climate classification system, Sinking Ship is located in a cold semi-arid climate zone.

Etymology

This geographical feature was named "Three Castles" before its present name was officially adopted in 1932 by the U.S. Board on Geographic Names. The descriptive name is because the dip or tilt of the strata, caused by bending movement of the rock, creates the appearance of a ship sinking into the canyon. The name is attributable to M. R. (Miner Raymond) Tillotson (1886–1955), superintendent of Grand Canyon National Park from 1922 to 1938.

Geology

The summit of Sinking Ship is composed of Kaibab Limestone caprock overlaying cream-colored, cliff-forming, Permian Coconino Sandstone. The sandstone, which is the third-youngest of the strata in the Grand Canyon, was deposited 265 million years ago as sand dunes. Below the Coconino Sandstone is slope-forming, Permian Hermit Formation, which in turn overlays the Pennsylvanian-Permian Supai Group. Further down are strata of Mississippian Redwall Limestone, and Cambrian Tonto Group. Whereas most strata of the Grand Canyon are normally horizontal, at Sinking Ship the strata have been shifted by the Cremation Fault and a monocline. This Precambrian fault was dormant until reawakened during the Laramide orogeny. The eastward tilt of Sinking Ship is due to its position astride the axis of the Grandview-Phantom monocline. Precipitation runoff from Sinking Ship drains north into the nearby Colorado River via Hance Creek.

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