GEO 100 Final Exam Re X + v Chapter Deserts anld Glaciers Where the glaciers exi

Question

GEO 100 Final Exam Re X + v Chapter Deserts anld Glaciers Where the glaciers exists today, how they are formed, how they move (advancing/retreating) and what is the rate of glacial movement? Glacial erosion and its products: - how glacial striations are formed, explain cirques, horns, arêtes, U vs. V valley shape types, tarns hanging valleys. - Glacial deposition: moraines(types), what is glacial till, erratic, glacial outwash, kettle hole, drumlins, eskers. The global distribution of deserts, the nature and types of deserts; Explain formatipn of cross-beddings, loess, blowouts in desert environment: How alluvial fans and playas are formed and related; Chapter Oceans Parts of Continental Marpins and their characteristics lAsti

Explanation / Answer

Hi,

Ans :

They are found in : Extensive glaciers in Antarctica, Chile, Canada, Alaska, Greenland and Iceland. Mountain glaciers are widespread, especially in the Andes, the Himalayas, the Rocky Mountains, the Caucasus, Scandinavian mountains and the Alps.

Glaciers are formed where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. when snow remains in the same area year-round, where enough snow accumulates to transform into ice. Each year, new layers of snow bury and compress the previous layers. This compression forces the snow to re-crystallize, forming grains similar in size and shape to grains of sugar.

Glacial movement. A glacier might look like a solid block of ice, but it is actually moving very slowly. The glacier moves because pressure from the weight of the overlying ice causes it to deform and flow. Meltwater at the bottom of the glacier helps it to glide over the landscape.Glaciers grow (advance) and shrink (retreat) as a result of precipitation, melting and sublimation.

Many move at a rate between zero and about half a kilometre (0.3 miles) per year. The fastest moving glacier is in Greenland, rushing forward at 12.6 kilometres (7.8 miles) per year.

Thank you.

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.