Diego is straitened
the rock material and deposited by glaciers
Glacial Drift
When the glacier melted from North America it left a mass of "heterogeneous" rock debris (loosely termed "glacial drift") etc
Till or glacial till is unsorted glacial sediment. Glacial drift is a general term for the coarsely graded and extremely heterogeneous sediments of glacial origin.Glacial till is that part of glacial drift which was deposited directly by the glacier.Its content may vary from clays to mixtures of clay, sand, gravel and boulders. This material is mostly derived from the subglacial erosion and entrainment by the moving ice of the glaciers of previously available unconsolidated sediments.A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. Glaciers slowly deform and flow due to stresses induced by their weight, creating crevasses, seracs, and other distinguishing features. They also abrade rock and debris from their substrate to create landforms such as cirques and moraines. Glaciers form only on land and are distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water.
It's a stratified drift.
the rock material and deposited by glaciers
A glacial drift deposits and carries away glaciers
glacial drift is the rock material carried and deposited by glaciers!
Glacial Drift
Glacial drift
David Drewry has written: 'Glacial geologic processes' -- subject(s): Glaciers, Glacial landforms, Drift
there is glacial drift and that is the act of rock material carried and deposited by glaciers. there is till which is the act of unsorted rock material that is deposited directly by a melting glacier and there is stratified drift which is the result of a glacial deposit that has been sorted and layered by action of streams or meltwater
Glacial Drift
Glacial Drift
1) Glaciers carve fjords in valleys where they travel. A fjord is a long, narrow valley with steep sides carved by glacial movement. A fjord represents the seaward end of a deeply excavated glacial-trough valley that was partially submerged by drowning after melting of the ice. 2) Glaciers leave behind deposits known as glacial till, which are unstratified, poorly-sorted sediments. Glaciers move a wide range of sedimentary particles from small clay-sized particles to large boulders. When the glacier either melts or retreats, these poorly-sorted sediments are deposited. These deposits are known as tillite in lithified sedimentary rocks. 3) A mound or ridge of till (unstratified glacial drift) is deposited when a glacier begins to retreat or melt. As the glacier grows and extends, it pushes glacial drift at its front forming a mound of debris. This glacial drift is then dropped in place when the glacier retreats or melts which creates a terminal moraine. Medial moraines, which are formed by the conjunction of two glaciers, are also deposited as a glacial melts. Glaciers erode the sides of the valleys in which they travel. Therefore, when two glaciers unite (in much the same rivers unite), a line of glacial drift (medial moraines) from both glaciers is formed. 4) Glaciers leave scrape marks behind on the rocks on which they traveled.
Glacial Drift
When the glacier melted from North America it left a mass of "heterogeneous" rock debris (loosely termed "glacial drift") etc