HW 14

Which of the placemarks in the Lateral Moraine folder represents a lateral moraine?

C

Which answer most accurately describes the relationship between the Long Island moraines, Cape Cod (the large peninsula shaped like a flexed arm), and Martha's Vineyard (the large island south of Cape Cod)? Use the map below as a guide.

Cape Cod and Martha's Vineyard also contain moraines. The moraines of Cape Cod and Martha's Vineyard were formed during the same glacial episode as the Long Island moraines. The northern moraine of Long Island was once continuous with the small peninsula protruding from the southwestern portion of Cape Cod. The southern moraine of Long Island was once continuous with Martha's Vineyard.

Which of the colored lines shown in the Equilibrium Line folder is the best choice for the location of the equilibrium line for this glacier?

D

How has the changing climate in western Nebraska stabilized ancient dunes such as the Sand Hills?

Grass now grows on the Sand Hills, stabilizing them.

What is the name of the glacial feature shown in the image below?

Medial moraine

What kind of desert feature is marked by the arrow in this figure?

alluvial fan

What desert landform is created when several alluvial fans overlap?

bajada

Which of the following terms associated with glacial processes is not represented by location(s) placemarked in the Terminology folder?

basal slip

Fly around the Mud Pond overlay area, zooming in and out as you explore. What term properly describes the landforms shown on the topographic map here?

drumlins

Which of the following terms best identifies the feature located at the Glacial Deposition placemark?

recessional moraine

Based on the historical imagery at the location in the folder, how far did the glacier advance or retreat between 1996 and 2005?

retreated approximately 750 meters

Many drumlins are asymmetrical, with a blunt end and a tapered end; the tapered end is usually oriented in the same direction that the glacier advanced. Survey the area with Google Earth and gauge the drumlin field. Which direction does it appear the glacier was moving?

southward

What factors might affect the shape of different types of dunes?

wind direction sediment supply vegetation

What is the elevation at this point (the highest point along the Transect A path)? Answer in feet.

312 feet

Calculate the area covered by the Mud Pond overlay (the rectangle of topographic map). Use the ruler tool to help you. Answer in square miles.

5.5 square miles

Which of the placemarks in the Alpine Landforms folder represents a tarn?

B

How does the presence of Bailey Hill appear to affect the land use pattern in this area?

Bailey Hill is undeveloped. The surrounding area is highly developed. This is likely due to the difficulty of developing an area with a steep slope.

Which of the placemarks in the Alpine Landforms folder represents an arête?

C

The Basin and Range Province is characterized by a large number of horsts and grabens. What does this indicate about the forces that affected the crust?

Tensional forces are acting on the crust.

Which answer most accurately describes the elevations of the moraine(s)?

The elevations are highest on western Long Island and get successively lower to the east. There seems to be only one high point along the Transect A path. To the east, one moraine forms the north shore of Long Island, and another branches off in an east-to-southeast direction near the Transect B path, crossing Long Island and finally forming the "south fork" of eastern Long Island.

How does Bailey Hill compare in length, width, and height with the landforms around Mud Pond?

The length, width, and height of Bailey Hill are all less than those of the landforms near Mud Pond.

Check all that apply.

The number of glaciers retreating will increase. The amount of melting will increase in many glaciers. Fewer areas on Earth will have climates that support year-round snow and ice, conditions necessary for glaciers to form. Some glaciers will completely disappear

Consider the variation in length of Nisqually Glacier on Mt. Rainier, Washington depicted on figure 14.13 in your lab manual. Why has the Nisqually Glacier retreated over the past 100 years?

The rate of ablation is higher than the rate of accumulation More snow and ice has been removed than added

Based on your evaluation of imagery in the Helheim Glacier folder, identify the statement that is most strongly supported.

This glacier is flowing in a predominantly west to east direction but it is retreating in an east to west direction.