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by BlastRoom
Identify glacial landforms and evidence left by past ice.
#earth_space_science
40 questions
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The image shows a steep-walled bowl cut into the head of a mountain valley, with cliffs on three sides and a small lake on the floor. What feature is this?
A narrow, jagged ridge separates two glacier-carved valleys in the image. What erosional landform is shown?
The image shows a pyramid-shaped mountain peak with steep faces carved on several sides by cirques. What is the peak called?
The photograph shows a wide mountain valley with a flat floor and steep straight walls after the ice has melted. What landform is it?
The image shows a waterfall dropping from a side valley that ends high above the floor of a larger glacier-carved valley. Why does the side valley's floor sit so much higher?
The image shows a long, narrow, steep-walled inlet filled with seawater where a glacier once cut below sea level. What landform is this?
A bedrock knob in the image has a smooth gentle upstream side and a steep plucked downstream side. What landform is it?
The image shows triangular rock faces cut off along a glacial trough where old interlocking ridges were sliced away. What feature is shown?
Two cirques have eroded toward each other until a low notch cuts through the ridge between them. What is the notch called?
The image shows a chain of small lakes in rock basins stepping down a formerly glaciated valley. What feature is shown?
A curved ridge of unsorted till crosses the mouth of a valley at the farthest point reached by a glacier. What deposit is it?
Several low ridges of till lie across a valley behind the outermost moraine, each marking a pause as ice retreated. What are they?
The image shows a long ridge of rocky debris running along one side of a former valley glacier. What feature is this?
Two tributary glaciers once joined here, leaving a debris ridge along the center of the combined glacier path. What deposit formed?
The image shows a thin, uneven blanket of unsorted clay, sand, pebbles, and boulders spread across bedrock. What deposit is it?
A smooth, elongated oval hill of till has a blunt end and a tapered tail aligned with former ice flow. What landform is it?
A long, narrow, winding ridge of sorted sand and gravel crosses a flat plain. What glacial landform is shown?
The image shows a round depression, now a pond, in an outwash plain where buried ice melted. What feature is it?
A broad, flat surface of layered sand and gravel extends beyond a former glacier margin and was built by braided meltwater streams. What is it?
A flat-topped bench of layered sand and gravel sits along a valley wall where meltwater flowed between ice and rock. What landform is it?
A sediment sample has clay, sand, pebbles, and boulders mixed together with no layers. Is the deposit glacial till or glacial outwash?
A bank beside a former meltwater channel shows horizontal layers of sorted sand and rounded gravel. Is the deposit glacial till or glacial outwash?
A compact gray deposit holds scattered boulders in a fine clay-rich matrix, with no bedding. Which glacial sediment is it?
A gravel pit exposes well-rounded pebbles in clear beds that get finer away from the former ice margin. Which sediment is it?
A moraine core contains angular boulders, pebbles, sand, and clay all packed together. Which material makes up most of it?
A flat plain beyond an end moraine contains cross-bedded sand and gravel sorted by size. What sediment is described?
Use the contour map. Points A and B sit on opposite sides of the valley. What valley profile would a cross section from A to B show?
Use the contour map of a straight mountain valley. What agent most likely carved its shape?
Use the contour map. Points A and B sit on opposite walls of the valley. What glacial landform is mapped?
A small side valley ends high above the floor of a deeper, flat-floored main valley carved by a glacier. What is the side valley called?
Use the contour map of a glaciated valley. How did glacial erosion change the older river valley?
Use the contour map of a north-south valley. What process best explains its shape?
The bedrock image shows many parallel scratches all trending the same way across a polished surface. What evidence is shown?
A large granite boulder rests on local limestone bedrock far from any granite outcrop. What is the best evidence-based interpretation?
Use the shaded-state map. Glacial deposits appear across several northern states but not the southern comparison states. What past event fits the pattern?
An exposed outcrop has polished rock, grooves, and a thin cover of unsorted till. What does this combination most strongly show?
A hillside contains nested ridges of till, each crossing the valley like a curved dam. What do the ridges record?
A drumlin field has blunt, steep ends facing north and long tapered tails pointing south. Which way did the ice move?
On a roche moutonnée, the gentle polished side faces west and the steep plucked side faces east. Which way did the glacier move?
A field of streamlined drumlins has blunt ends to the northeast and tapered tails to the southwest. What was the ice-flow direction?
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50 questions
