Lithology and Vegetation Flashcards
(21 cards)
bedrock lithology
When Geographers talk about the physical properties of different rocks
example of igneous rock
basalt and granite
igneous
more resistant to erosion and weathering.
why is igneous more resistant?
igneous rocks contain crystals which increase the strength of the rocks and reduce the number of lines of weaknesses that would be exploited by physical processes.
Bedrock lithology
the physical characteristics of different rocks
examples of igneous rock
granite and basalt
why are igneous rocks more resistant?
igneous rocks contain crystals which increase the strength of the rocks and reduce the number of lines of weaknesses that would be exploited by physical processes
rate of erosion for igneous rocks
0.1-0.5cm p/yr
How are igneous rocks formed?
formed from magma inside the Earth or formed when magma escapes through vents on the Earth’s surface
Example of sedimentary rocks
limestone and sandstone
rate of erosion for sedimentary rock
2-6 cm p/yr
how are sedimentary rocks formed?
the build-up, compacting and hardening of sediments into layers over time by lithification.
example of metamorphic rock
slate and marble
how are metamorphic rocks formed?
a process where the rock is metamorphosed
change of structure in igneous/sedimetnary rock
rate of erosion for metamorphic rock
resistant
Xerophytes
withstand periods of dry weather
Halophytes
plants that can withstand high concentrations of salt from seawater
vegetation succession on yellow dunes
colonised by marram grass. These plants also have long deep roots and are salt tolerant.
vegetation succession on grey dunes
colonised by marram grass. These plants also have long deep roots and are salt tolerant.
