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14-533: Jussieu Peninsula is a peninsula located at the south east end of Eyre Peninsula in South Australia . It is bounded by Proper Bay and Spalding Cove within the natural harbour known as Port Lincoln to the north, Spencer Gulf to the east and the Great Australian Bight to the south. While it was first explored and mapped by Matthew Flinders during February 1802, Flinders did not name it. In 1913,

28-405: A glacier and deposited directly by or from the ice, or by glacial meltwater . Drift is often subdivided into (unsorted and) unstratified drift (glacial till ) that forms moraines and stratified drift (glaciolacustrine and fluvioglacial sediments) that accumulates as stratified and sorted sediments in the form of outwash plains , eskers , kames , varves , and so forth. The term drift clay

42-590: Is a synonym for boulder clay . Both are archaic terms for glacial tills with a fine-grained matrix. In the United Kingdom, drift is also applied as a general term for all surficial, unconsolidated, rock debris and sediment that is moved from one place to accumulate in another and mapped separately or otherwise differentiated from underlying bedrock . In this usage, drift includes a wide variety of deposits, e.g. loess , glacial till, river deposits, colluvium , and so forth, of Quaternary age. However, this term

56-515: Is most commonly used to specifically describe glacial deposits. In 1839, geologist Roderick Murchison introduced the term drift to describe unconsolidated surficial sediments previously called diluvium . The term drift refers to the drift hypothesis proposed by Charles Lyell , as influenced by contemporary polar research, that these sediments had been transported by sea ice and icebergs drifting in marine currents. The drift hypothesis further proposed that these sediments had been released as

70-633: The Lincoln National Park and the Memory Cove Wilderness Protection Area . A shore-based bay whaling station is believed to have operated at Spalding Cove between 1829 and 1832. This South Australia geography article is a stub . You can help Misplaced Pages by expanding it . Peninsula The word peninsula derives from Latin paeninsula , from paene  'almost' and insula  'island'. The word entered English in

84-558: The 16th century. A peninsula is generally defined as a piece of land surrounded on most sides by water. A peninsula may be bordered by more than one body of water, and the body of water does not have to be an ocean or a sea. A piece of land on a very tight river bend or one between two rivers is sometimes said to form a peninsula, for example in the New Barbadoes Neck in New Jersey , United States. A peninsula may be connected to

98-489: The formation of a peninsula. For example, in the case of Florida , continental drift, marine sediment, and marine transgressions were all contributing factors to its shape. In the case of formation from glaciers (e.g., the Antarctic Peninsula or Cape Cod ), peninsulas can be created due to glacial erosion , meltwater or deposition . If erosion formed the peninsula, softer and harder rocks were present, and since

112-466: The glacier only erodes softer rock, it formed a basin . This may create peninsulas, and occurred for example in the Keweenaw Peninsula . In the case of formation from meltwater, melting glaciers deposit sediment and form moraines , which act as dams for the meltwater. This may create bodies of water that surround the land, forming peninsulas. If deposition formed the peninsula, the peninsula

126-501: The mainland via an isthmus , for example, in the Isthmus of Corinth which connects to the Peloponnese peninsula. DON'T FORGET OR ELSE Peninsulas can be formed from continental drift , glacial erosion , glacial meltwater , glacial deposition , marine sediment , marine transgressions , volcanoes, divergent boundaries or river sedimentation. More than one factor may play into

140-522: The name proposed by François Péron and Louis de Freycinet from Baudin's expedition when it visited later in 1802 was declared as the peninsula's official name by the Government of South Australia . Jussieu refers to the French botanist, Antoine Laurent de Jussieu . While parts of its surface have been cleared and used for agricultural purposes in the past, it is currently occupied by two protected areas :

154-468: The sediment is deposited, forming a delta peninsula. Marine transgressions (changes in sea level) may form peninsulas, but also may affect existing peninsulas. For example, the water level may change, which causes a peninsula to become an island during high water levels. Similarly, wet weather causing higher water levels make peninsulas appear smaller, while dry weather make them appear larger. Sea level rise from global warming will permanently reduce

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168-403: The size of some peninsulas over time. Peninsulas are noted for their use as shelter for humans and Neanderthals . The landform is advantageous because it gives hunting access to both land and sea animals. They can also serve as markers of a nation's borders. Drift (geology) In geology, drift is a name for all sediment ( clay , silt , sand , gravel , boulders ) transported by

182-552: The volcano erupts near shallow water. Marine sediment may form peninsulas by the creation of limestone . A rift peninsula may form as a result of a divergent boundary in plate tectonics (e.g. the Arabian Peninsula ), while a convergent boundary may also form peninsulas (e.g. Gibraltar or the Indian subcontinent ). Peninsulas can also form due to sedimentation in rivers. When a river carrying sediment flows into an ocean,

196-538: Was composed of sedimentary rock , which was created from a large deposit of glacial drift . The hill of drift becomes a peninsula if the hill formed near water but was still connected to the mainland, for example during the formation of Cape Cod about 23,000 years ago. In the case of formation from volcanoes, when a volcano erupts magma near water, it may form a peninsula (e.g., the Alaskan Peninsula ). Peninsulas formed from volcanoes are especially common when

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