Admin Table of Contents
What are smoothly rounded oval hills of glacial till called?
Cards
| Term glaciers located in the mountains that occupy former river valleys are… | Definition alpine glaciers |
|---|---|
| Term _______ are smoothly rounded oval hills that occur in swarms behind the terminal moraine. | Definition drumlins |
What is a round basin that is formed when a glacier melts?
Kettle lakes form when a piece of glacier ice breaks off and becomes buried by glacial till or moraine deposits. Over time, the ice melts, leaving a small depression in the land, filled with water. Kettle lakes are usually very small, more like ponds than lakes.
What forms when glaciers melt?
Glacial melt increases water flow and creates stream valleys and rivulets. It also creates glacial lakes, which can lead to dangerous flash floods, known as mountain tsunamis, if the flow is blocked and natural dams break.
What is a Drumlin Hill?
Drumlins are hills of sediment (generally a quarter of a mile or more in length) that have been streamlined by glacier flow. Thus, they are often elongated.
What is streamlined bedrock?
Streamlined bedrock ridges evidently formed by a process strongly constrained to geological structure and local topography, as they have been observed downstream of prominent hard layers or geological boundaries consistent with temporary damming and then outburst carving (fan-shaped streamlined bedrock ridges at WBF, a …
What are hills formed by glaciers called?
Drumlin, oval or elongated hill believed to have been formed by the streamlined movement of glacial ice sheets across rock debris, or till. Drumlins are often associated with smaller, glacially streamlined bedrock forms known as roches moutonnées.
Which formation is unsorted rocky debris left behind by a melting glacier?
Melting glaciers deposit all the big and small bits of rocky material they are carrying in a pile. These unsorted deposits of rock are called glacial till.
Which country has the most glaciers?
Most of the world’s glacial ice is found in Antarctica and Greenland, but glaciers are found on nearly every continent, even Africa….Summary Statistics by GTN-G Region.
| GTN-G region | Region Name | Glacier area, km2 |
|---|---|---|
| 1 | Alaska | 98531.7 |
| 2 | Western Canada and USA | 14380.4 |
| 3 | Arctic Canada, North | 111589 |
| 4 | Arctic Canada, South | 40888.2 |
Where is a drumlin located?
Drumlins are commonly found in clusters numbering in the thousands. Often arranged in belts, they disrupt drainage so that small lakes and swamps may form between them. Large drumlin fields are located in central Wisconsin and in central New York; in northwestern Canada; in southwestern Nova Scotia; and in Ireland.
How drumlins are formed?
Drumlins are oval-shaped hills, largely composed of glacial drift, formed beneath a glacier or ice sheet and aligned in the direction of ice flow.