Karst (Limestone) Topography - SS3 Geography Past Questions and Answers - page 2
What do stalactites and stalagmites commonly form in karst caves?
Ice formations
Underground lakes
Calcium deposits
Sedimentary rocks
Which of the following is not a characteristic feature of karst topography?
Sand dunes
Sinkholes
Caves
Resurgence springs
What happens to rivers and streams in karst regions as they flow through underground conduits?
They dry up completely
They become wider and deeper
They turn into waterfalls
They freeze during winter
Poljes are known for their:
Tower-like structures
Flat-bottomed depressions
High plateaus
Volcanic craters
Which type of rock is not primarily responsible for forming karst topography?
Dolomite
Gypsum
Granite
Limestone
Explain the geological process that leads to the formation of sinkholes in karst regions.
Sinkholes in karst regions form when the roofs of underground caves collapse, creating surface depressions. This occurs due to the dissolution of soluble rocks like limestone.
How do karst valleys differ from valleys formed by other geological processes, and what are their characteristics?
Karst valleys are characterized by U-shaped depressions formed by the collapse of cave roofs, in contrast to valleys formed by other processes like glaciers or rivers.
Describe the ecological significance of karst regions and their impact on biodiversity.
Karst regions are ecologically significant as they often host unique species adapted to cave and underground environments, contributing to high biodiversity. They can also influence groundwater quality and supply.
What are the main factors that influence the development of tower karst formations in certain karst regions like those in China?
Tower karst formations, like those in China, are formed due to the differential erosion of limestone, resulting in tall pillars or towers.
Discuss the role and importance of resurgence springs in karst landscapes and the potential challenges they pose for water management.
Resurgence springs in karst landscapes are crucial for water discharge but can pose challenges for water management due to their variable flow rates and vulnerability to pollution.