Question 1

Which rocks most commonly form karst landforms?&#10;A) sandstones and shales&#10;B) granites and volcanic rocks&#10;C) slates and gneisses&#10;D) limestones and dolomites

Accepted Answer

Karst landforms are primarily formed in regions that have soluble rock such as limestone and dolomite. These rocks dissolve in water over time, creating features such as sinkholes, caverns, and underground rivers. Sandstones, shales, granites, and slates are not soluble and do not form karst landforms.

Question 2

What is the basic requirement for karst features to form?&#10;A) fractured and water-saturated rock&#10;B) rock with steep relief in area with much precipitation&#10;C) rock is soluble in prevailing climate&#10;D) fractured rock and dry climate

Accepted Answer

Karst features form in areas where the bedrock is soluble in the prevailing climate. This means that the rock can be dissolved by water, which results in the formation of features such as sinkholes, caves, and underground rivers. The presence of fractures in the rock can enhance the development of karst features, but it is not a requirement. Precipitation and a steep relief can also contribute to the formation of karst features, but they are not the essential factors.

Question 3

Which process is responsible for producing karst landforms and landscapes?&#10;A) landslides&#10;B) dissolution&#10;C) stream erosion&#10;D) mudflows

Accepted Answer

Karst landforms and landscapes are formed by the process of dissolution, which involves water dissolving soluble rocks such as limestone and creating features such as sinkholes, caves, and underground drainage systems. Landslides, stream erosion, and mudflows can contribute to changes in the landscape, but they are not responsible for the unique features of karst terrain.

Question 4

Most karst features develop above ground.

Accepted Answer

Most karst features develop underground, such as caves, sinkholes, and underground rivers. However, some surface features can also occur in karst areas, including disappearing streams and exposed limestone cliffs.

Question 5

Generally, karst features will form more rapidly in areas with:&#10;A) steep relief&#10;B) flat surfaces&#10;C) dense vegetation&#10;D) populated areas

Accepted Answer

Karst features like sinkholes, caves, and underground river systems are formed by the dissolution of soluble rocks such as limestone, dolomite, and gypsum. Steep relief means that water can flow more easily and quickly over the surface and into fractures and pores in the rock, increasing the rate of chemical weathering and dissolution. Flat surfaces would not have the same drainage patterns and would slow the process of karstification. Dense vegetation can slow down water flow and reduce erosion, which would also slow the formation of karst features. Populated areas may have more disturbances to the natural landscape, but this would not affect the rate of karstification itself.

Question 6

The best-known karst landscapes have developed in this type of bedrock.&#10;A) granite&#10;B) sandstone&#10;C) limestone&#10;D) dolomite&#10;E) both c & d

Accepted Answer

Karst landscapes are most commonly associated with soluble rock types such as limestone and dolomite. These rocks dissolve in slightly acidic water, leading to the formation of karst features like caves, sinkholes, and underground rivers.

Question 7

Which statement is most true with regards to karst development?&#10;A) limestones that contain more than 20 to 30 percent minerals other than calcite&#10;B) dolomites that do not contain calcite minerals&#10;C) limestones that contain less than 20 to 30 percent minerals other than calcite&#10;D) beds of shale and sandstone within thick limestones

Accepted Answer

Karst development occurs mainly in limestones that are composed of at least 70 to 80 percent of the mineral calcite. Limestones that contain less than 20 to 30 percent minerals other than calcite are considered pure and are more susceptible to karstification. Therefore, option C is most true with regards to karst development.

Question 8

Sinkholes are more likely to form in these karst areas.&#10;A) tropical&#10;B) Caribbean&#10;C) temperate&#10;D) all of these

Accepted Answer

The answer of Sinkholes are more likely to form in...

Question 9

Which type of karst landscape was identified by geomorphologists?&#10;A) temperate&#10;B) arid&#10;C) tropical&#10;D) both b & c&#10;E) both a & c

Accepted Answer

Karst landscapes can be identified in various climatic conditions, including both temperate and tropical regions. These areas are characterized by soluble rock (like limestone) that undergoes dissolution processes, leading to unique landforms such as caves, sinkholes, and underground rivers. The process and features can significantly differ between temperate and tropical climates due to variations in vegetation, temperature, and rainfall, but both are recognized settings for karst development.

Question 10

This type of karst landscape is typified by flat-lying limestone beds with conduit developments occurring underground.&#10;A) tropical&#10;B) Caribbean&#10;C) temperate&#10;D) all of these

Accepted Answer

The answer of This type of karst landscape is typified...

Question 11

Groundwater within Karst systems travels at the same speed.

Accepted Answer

The answer of Groundwater within Karst systems travels at the...

Question 12

This karst feature is identified by the failure of the roof of a cave.&#10;A) solution sinkhole&#10;B) collapse sinkhole&#10;C) karst tower&#10;D) swallow hole

Accepted Answer

The answer of This karst feature is identified by the...

Question 13

Karst towers are more likely to form in these karst areas.&#10;A) tropical&#10;B) Caribbean&#10;C) temperate&#10;D) all of these

Accepted Answer

The answer of Karst towers are more likely to form...

Question 14

These form on the roofs of caves.&#10;A) stalactites&#10;B) stalagmites&#10;C) columns&#10;D) both a & c

Accepted Answer

The answer of These form on the roofs of caves.&#10;A)...

Question 15

Where two or more neighboring sinkholes join to become even larger depressions, it is called a(n):&#10;A) swallow hole&#10;B) uvala&#10;C) suffusion sink&#10;D) the big shaft

Accepted Answer

The answer of Where two or more neighboring sinkholes join...

Deck 42: Karst Processes and Landforms