Turnpike Bluff

{{Use dmy dates|date=April 2022}} {{Infobox mountain | name = | other_name = | image = | image_size = | image_upright = | image_alt = | image_caption =  | map = Antarctica  | highest = | highest_location = | elevation = | elevation_m = | elevation_ft = | elevation_ref = | elevation_system = | prominence = | prominence_m = | prominence_ft = | prominence_ref = | parent_peak = | isolation = | isolation_km = | isolation_mi = | isolation_parent = | isolation_ref = | listing = | coordinates = {{coord|80|44|S|30|4|W|display=it}} | coordinates_ref =  | length = | length_km = | length_mi = | length_orientation = | length_ref = | width = | width_km = | width_mi = | width_orientation = | width_ref = | area = | area_km2 = | area_mi2 = | area_ref = | volume = | volume_km3 = | volume_mi3 = | volume_ref =  | etymology = | nickname = | native_name =  | native_name_lang =  | translation = | pronunciation = | authority =  | location =  | country_type =  | country =  | state_type = | state =  | region_type = | region =  | district_type = | district =  | part_type = | part =  | settlement_type = Use settlement_type= instead of city_type= (deprecated). | settlement =  | range_coordinates = | range_coordinates_ref = | range = | borders_on = | grid_ref_UK = | grid_ref_UK_ref = | grid_ref_Ireland = | grid_ref_Ireland_ref = | topo_maker = | topo_map = | biome =  | formed_by = | orogeny = | age = | type = | geology = | volcanic_zone = | volcanic_arc = | volcanic_belt = | volcanic_field = | volcanic_arc/belt = | last_eruption =  | first_ascent = | easiest_route = | normal_route = | access =  | embedded = | module = }} '''Turnpike Bluff''' ({{coord|80|44|S|30|4|W}}) is a conspicuous rock formation in the Shackleton Mountains of Antarctica.{{sfn|Alberts|1995|p=765}}

==Exploration== thumb|Otter Highlands to the southwest of Blaiklock Glacier. Turnpike Bluff in southwest First mapped in 1957 by the Commonwealth Trans-Antarctic Expedition, and so named because it marks entry to a crevassed area of Recovery Glacier through which the Expedition's vehicles had difficulty in passing on their journey from Shackleton Base to the South Pole in 1957.{{sfn|Alberts|1995|p=765}}

==Location==

Turnpike Bluff is in the south of the Otter Highlands, to the north of the Recovery Glacier.{{sfn|Shackleton USGS map}} It lies five nautical miles (9 km) southwest of Mount Homard, at the southwest extremity of the Shackleton Range.{{sfn|Alberts|1995|p=765}}

==Geology==

The Turnpike Bluff Group is a sedimentary sequence of rocks exposed on the south flank of the Shackleton Range. The sequence includes basal clastics and quartzite, followed by carbonate-bearing clastics with Riphean age stromatolite colonies, and capped by over 1 km of greywacke and quartzitic arenite, alternating with pelite. The sequence is underlain unconformably by an Archean granitoid basement (1400 Ma). Metamorphism occurred at 526 Ma.{{sfn|Paech|Hahne|Vogler|1991|pp=123–128}} The group contains four formations, named after Wyeth Heights, Stephenson Bastion, Flett Crags and Mount Wegener.{{sfn|Clarkson|1983|p=109}} These are features along the southern margin of the Shackleton Mountains, from west to east.{{sfn|Shackleton USGS map}}

==References== {{reflist |25em}}

==Sources== {{refbegin}} *{{citation|url=https://pubs.usgs.gov/fedgov/70039167/report.pdf |accessdate=2023-12-03 |edition=2 |editor-last=Alberts |title=Geographic Names of the Antarctic |editor-first=Fred G. |publisher=United States Board on Geographic Names |year=1995}} {{Include-USGov |agency=United States Board on Geographic Names}} *{{citation |url=https://webarchive.nationalarchives.gov.uk/ukgwa/20150703115600/http://www.antarctica.ac.uk/documents/bas_bulletins/bulletin52_08.pdf |accessdate=2023-12-10 |last=Clarkson |first=Peter D. |title=Geology of the Shackleton Range II The Turnpike Bluff Group |work=British Antarctic Survey Bulletin |issue=52 |year=1983 |pages=109–124}} *{{citation |editor1-last=Thomson |editor1-first=M.R.A. |editor2-last=Crame |editor2-first=J.A. |editor3-last=Thomson |editor3-first=J.W. |last1=Paech |first1=H.-J. |last2=Hahne |first2=K. |last3=Vogler |first3=P. |title=Crustal development: the Transantarctic Mountains, in Geological Evolution of Antarctica |date=1991 |publisher=Cambridge University Press |location=Cambridge |isbn=9780521372664}} *{{citation |url=https://commons.wikimedia.org/wiki/File:C80020s1_Ant.Map_Shackleton_Range.jpg |accessdate=2023-12-04 |title=Shackleton Range |publisher=United States Geological Survey |year=1983 |ref={{harvid|Shackleton USGS map}} }} {{Include-USGov |agency=United States Geological Survey}} {{refend}}

Category:Cliffs of Coats Land