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What else can I help you with?
Long steep-sided bays that were once glacial troughs?
fiords
What features indicates that many continents were once near Earths South Pole?
A) glacial deposits
What does the presence of peat in glacial till tell us?
The presence of peat in glacial till suggests that the area was once covered by wetlands or marshes where peat formed. This can give clues about the past environmental conditions and the type of vegetation that was present in that area.
Did Wegener used glacial striations to help build the theory of plate tectonincs?
Yes, Wegener did use evidence of glacial striations to support his theory of continental drift. He observed that matching glacial striations on continents separated by oceans suggested they were once connected and had moved apart. This was one of the pieces of evidence Wegener used to develop his theory of plate tectonics.
Why Glacial deposits found in Africa India and Australia?
Glacial deposits are found in Africa, India, and Australia because these regions were once covered by ice sheets during past glacial periods. The movement of glaciers transported rocks, sediments, and other materials across these continents, leaving behind distinct glacial deposits like till, moraines, and erratics. These deposits serve as evidence of the Earth's past climate history and the presence of glaciers in regions where they are uncommon today.
Was late paleozoic glacial features propsed as evidence of pangaea?
Yes, late Paleozoic glacial features, such as glacial deposits and striations found in now-tropical regions, were proposed as evidence for the existence of Pangaea. These glacial remnants indicate that continents, now spread out, were once connected and positioned near the South Pole, allowing for extensive glaciation. This evidence supports the idea of continental drift and the theory of plate tectonics, illustrating how continents have moved over geological time.
What are depressions left by melted blocks of ice in glacial deposits?
Kettle holes are depressions left by melted blocks of ice in glacial deposits. These features are typically surrounded by mounds of sediment called kames. Kettle holes are common in areas that were once covered by glaciers during the last Ice Age.
How does the lithosphere respond to the weight of glacial ice?
The lithosphere responds to the weight of glacial ice by bending and deforming, leading to the depression of the land underneath the ice. This process is known as glacial isostatic adjustment, where the lithosphere sinks under the weight of the ice and rises once the ice melts, slowly returning to its original position over time.
What is Alfred wegner glacial evidence?
Alfred Wegener's glacial evidence primarily refers to the distribution of glacial deposits and striations found on continents that are now widely separated. He noted that regions like South America, Africa, India, and Australia displayed signs of ancient glaciation, indicating that these landmasses were once joined in a supercontinent called Pangaea during the late Paleozoic era. The alignment of glacial features, such as glacial till and grooves, further supported his theory of continental drift, suggesting that these continents moved away from the polar regions, where glaciers would have formed, to their current positions.
What is the name of the glacial landform that is characterized a large amphitheater-shaped area in the higher elevations of mountains that are now once once were the site of mountain glaciers?
The glacial landform you are referring to is called a "cirque." Cirques are bowl-shaped depressions formed by the erosion of glaciers, typically found at the head of a valley. They often contain a small lake, known as a tarn, and are characterized by steep, rocky walls.
Is a drumlin caused by erosion?
A drumlin is a land-form from glacial deposition, which was once eroded. It is formed both by erosion and deposition. A drumlin is formed when moraine deposited by a retreating glacier is subsequently reshaped by the returning glacier the following year or after the glacial interval with caused the glacier to retreat in the first place.
What are glacial moraines are best described as?
Glacial moraines are accumulations of rock, soil, and debris carried and deposited by a glacier. They form as the glacier flows, picking up material from the land surface and carrying it along. Once the glacier retreats, it leaves behind these deposits, creating distinctive ridges and mounds.
