Misplaced Pages

Alabama Nunatak

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.

Alabama Nunatak is a nunatak in the King Frederik VIII Land area of northeastern Greenland . Administratively it is part of the Northeast Greenland National Park zone.

#472527

16-537: This nunatak was named by Ejnar Mikkelsen after his ship during the 1909-12 Alabama Expedition . Mikkelsen and Iver Iversen went up the Storstrommen to reach the head of the Danmark Fjord , leaving this nunatak on the left in their arduous dogsled journey over the ice. Few details are known about the circumstances of sighting and mapping of this nunatak, because Mikkelsen's diary, which had been kept in

32-621: A stub . You can help Misplaced Pages by expanding it . Ejnar Mikkelsen Ejnar Mikkelsen (23 December 1880 – 1 May 1971) was a Danish polar explorer and writer. He is most known for his expeditions to Greenland . Mikkelsen was born on 23 December 1880, in Vester Brønderslev, Jutland . In 1900, he served in the Georg Carl Amdrup expedition to Christian IX Land in East Greenland. He then served in

48-611: A Norwegian whaler in the summer of 1912. The so-called Alabama cottage has survived and was photographed during a visit by the Danish Navy inspection ship Ejnar Mikkelsen in September 2010. In 1924, he led an expedition to settle what later came to be Scoresbysund . In 1932, he led the "Second East-Greenland Expedition of the Scoresbysund Committee" that carried out the first archaeological excavations on

64-711: A cache at a rocky islet in Skaer Fjord , was destroyed by a polar bear . The Alabama Nunatak is located just north of the Ymer Nunatak , the northernmost spur of the Queen Louise Land group, and south of the Bildsoe Nunatak . It rises at the southwest end of Duke of Orleans Land , west of the area where the Storstrommen begins to flow southwards. This Greenland location article is

80-461: A span of 2 miles (3.2 km), the sea's depth increased from 50 meters (160 feet) to more than 690 meters (2,260 feet). Mikkelsen organized an expedition to map the northeast coast of Greenland and to recover the bodies of the ill-fated Denmark expedition leader, Ludvig Mylius-Erichsen , and cartographer, Niels Peter Høeg Hagen , in addition to their records. For this task, Mikkelsen wintered from 1909 to 1910 at Shannon Island . His wooden ship,

96-518: The Alabama , became trapped in the ice of Shannon Island and, while he was exploring, the rest of the party returned home on a whaler . Remaining with his engineer, Iver Iversen, Mikkelsen succeeded through a series of hazardous sledge journeys. They recovered the lost records in a cairn at the head of Danmark Fjord , discovering that "the Peary Channel does not exist." Hence, he rebutted

112-630: The Baldwin-Ziegler North Pole Expedition to Franz Joseph Land , which took place from 1900 to 1902. With Ernest de Koven Leffingwell , he organized the Anglo-American polar expedition which wintered off Flaxman Island, Alaska , in 1906–07. They lost their ship, but in a sledge journey over the ice, they located the continental shelf of the Arctic Ocean , 65 miles (105 km) offshore, where in

128-766: The Skaergaard intrusion by the shores of the Kangerlussuaq Fjord . In 1970, on his 90th birthday, a national tribute was paid to him in Denmark; he died in Copenhagen a few months later on 1 May 1971. In 2009, the Royal Danish Navy named the second Knud Rasmussen class patrol vessel the HDMS ; Ejnar Mikkelsen . The Ejnar Mikkelsen Range is named after him. The film Against

144-612: The Ice , released on 2 March 2022, depicts Mikkelsen's most famous ordeal. He was portrayed by Nikolaj Coster-Waldau . Skaergaard intrusion 68°10′06″N 31°43′01″W  /  68.1683°N 31.7169°W  / 68.1683; -31.7169 The Skaergaard intrusion is a layered igneous intrusion in the Kangerlussuaq area of East Greenland and is composed of various rocks and minerals including gabbro , olivine , apatite , and basalt . The Skaergaard intrusion

160-484: The Skaergaard intrusion can be used to model how the intrusion was originally formed and how magma fractional crystallization takes place. Multiple models of magmatic assimilation and recharge have been developed from the Skaergaard intrusion including the continuous replenishment model, intermittent recharge model, end-member replenishment model, and pulse recharge model. The Skaergaard intrusion also exhibits

176-428: The existence of a hypothetical sound or marine channel running from east to west separating Peary Land in northernmost Greenland from the mainland further south. The two explorers returned to Shannon Island to find the crew gone, but they used salvaged timbers and planking to erect a small cottage. Mikkelsen and Iversen then spent two winters at the cottage before they were rescued, in the direst of extremities, by

SECTION 10

#1732801372473

192-466: The lower parts of the intrusion are exposed to the north while sections of the roof are conserved to the south. The Skaergaard intrusion was first discovered by Lawrence Wager on his Arctic Air-Route Expedition in 1930. In 1933, the first aerial photography of the region was taken in order to create a topographic map of the area. The first scientific expedition to the intrusion took place in 1935 and 1936 and lasted over 13 months. This expedition

208-515: The lower zone, middle zone, and upper zone. The zone categorization is based on the occurrence of specific minerals such as augite , Fe-Ti oxides , rounded grains of olivine, apatite, and ferrobustamite. The intrusion formed from the crystallization of a convecting body of magma which resulted in the lineation , layering , cross bedding , and channel structures within the rocks. These features result from sedimentary formations created by grain re-arrangement via magmatic currents . Within

224-517: The solid rocks of the formation, the crystals are classified into two categories: primary precipitate crystals and interprecipitate crystals. Primary precipitate crystals form in conditions of high presence of liquids while interprecipitate crystals form from interprecipitate liquid, liquid in the spaces between grains which solidify them together. This data was developed from the 1939 memoir written by Lawrence Wager and William Alexander Deer from their 1935 expedition. Data acquired from researching

240-471: Was formed 56 million years ago during the opening of the North Atlantic Ocean . The intrusion was emplaced beneath the preexisting rock in the region, including plateau basalt and gneiss . The intrusion has a general oval shape, which is atypical in igneous emplacement. Due to the tectonic activity in East Greenland, the intrusion is now slightly tilted towards the sea. Specifically,

256-453: Was led by Wager accompanied by a small team, including geologist William Alexander Deer . Through this mission, the team studied the intrusion through reconnaissance mapping . The intrusion is made up of three separate geologic sequences which formed at the floor, roof, and walls, with the formation at the floor being much thicker than that of the other two sequences. The rocks of these sequences are further divided into three categories:

#472527