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Areas of study within glaciology include glacial history and the reconstruction of past glaciation. A glaciologist is a person who studies glaciers. A glacial geologist studies glacial deposits and glacial erosive features on the landscape. Glaciology and glacial geology are key areas of polar research.
Glacial striations at Mount Rainier National Park Glacial grooves stemming from the Wisconsin glaciation at Kelleys Island, Ohio. Glacial striations or striae are scratches or gouges cut into bedrock by glacial abrasion. These scratches and gouges were first recognized as the result of a moving glacier in the late 18th century when Swiss ...
Genesee River Middle Section Near Mount Morris Showing Glacial Changes in Valleys. The present river valley has been modified extensively from preglacial river valleys. A lobe of the last glacier (Wisconsonian) pushed southward almost to the Pennsylvania line, dramatically reshaping the drainage patterns of central and western New York. [1]
Bed softness may vary in space or time, and changes dramatically from glacier to glacier. An important factor is the underlying geology; glacial speeds tend to differ more when they change bedrock than when the gradient changes. [34] Further, bed roughness can also act to slow glacial motion.
If the glacial action erodes through, a spillway (or col) forms; Horn: a sharp peak connecting multiple glacier intersections, made up of multiple arêtes. Valley step: an abrupt change in the longitudinal slope of a glacial valley; Hanging Valleys: Formed by glacial meltwater eroding the land partially, often accompanied by a waterfall. [2]
Geologic time scale – System that relates geologic strata to time; Glacial history of Minnesota; Glacial period – Interval of time within an ice age that is marked by colder temperatures and glacier advances; Ice age – Period of long-term reduction in temperature of Earth's surface and atmosphere
Danube or Donau is a timespan in the glacial history of the Alps. Danube is currently regarded to have started approximately 1.8 million years ago, at the start of the Calabrian age of the international geochronology. It ended approximately one million years ago. Deep sea core samples have identified approximately 20 glacial cycles during ...
A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods. The Last Glacial Period ended about 15,000 years ago. [1]