Glacial Features and Processes

The video explains how glaciers melt and deposit materials, forming features like moraines, erratics, and drumlins. It covers the types of moraines, such as lateral, medial, and terminal, and describes how glaciers deposit till and create ground moraines. The video also discusses erratics, drumlins, and rock flour, which gives glacial lakes their distinctive color.

What happens to glaciers as they reach lower altitudes?

• They expand and grow larger.

• They stop moving entirely.

• They begin to melt due to rising temperatures.

• They become more solid and compact.

What are the long dark bands of debris on glaciers called?

• Lateral moraines

• Medial moraines

• Terminal moraines

• Moraines

Where do hanging glaciers typically stop?

• At the ocean

• At a cliff

• At the top of a valley

• At the base of a mountain

What is formed when two glaciers merge?

• A ground moraine

• A terminal moraine

• A medial moraine

• A lateral moraine

What is the main depositional feature at the end of a glacier?

• Terminal moraine

• Medial moraine

• Lateral moraine

• Ground moraine

What is the composition of till?

• Sorted sand and clay

• Unsorted clay, sand, stone, and boulders

• Only boulders

• Only clay

What is an erratic?

• A type of moraine

• A boulder transported by a glacier

• A small hill formed by wind

• A type of sediment

What are drumlins?

• Oval mounds of till

• Flat plains of sand

• Sharp peaks of ice

• Deep valleys

What gives glacial lakes a milky turquoise color?

• Rock flour sediment

• The reflection of the sky

• The depth of the water

• The presence of algae