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Is chalk harder than limestone?
No, limestone is harder than chalk. Limestone is a sedimentary rock composed mainly of calcite, whereas chalk is a soft, porous sedimentary rock composed mainly of calcium carbonate.
Is marble harder than basalt?
No, basalt is generally harder than marble. Basalt is a mafic extrusive rock that has a higher hardness and durability compared to marble, which is a metamorphic rock.
Where an area of harder rock to an area of softer rock the softer rock may wear away eventually forming a drop called what?
A waterfall. The softer rock erodes faster than the harder rock, creating a drop in the landscape as the water flows downstream. This process over time can lead to the formation of a waterfall where the softer rock has worn away.
Is the rock gneiss harder than granite?
Gneiss is typically harder than granite due to its higher metamorphism. Gneiss is formed from rocks that have undergone intense pressure and heat, which results in a stronger and more resistant rock compared to granite, which forms from the cooling and solidification of magma.
Which is harder sandstone shale or limestone?
"The two basic rocks found in the Mammoth Cave area are limestone and sandstone. Limestone is the "soft" rock (more water soluble) that is dissolved more easily by water. Sandstone and shale are the rocks that are on top of the cave. They are "harder" (less water soluble) and don't let the water soak into the cave." http://www.nps.gov/archive/maca/learnhome/cur_k3_cla.htm
What is a rock that is white and harder than chalk called?
A rock that is white and harder than chalk is likely to be marble. Marble is a metamorphic rock that is formed from limestone under high pressure and heat, making it harder and more durable than chalk, which is a soft sedimentary rock.
What rock is harder than sandstone?
Granite is typically harder than sandstone. Granite is an igneous rock that forms from the cooling of molten magma, making it more dense and resistant to abrasion compared to sandstone, which is a sedimentary rock.
Is chalk harder than limestone?
No, limestone is harder than chalk. Limestone is a sedimentary rock composed mainly of calcite, whereas chalk is a soft, porous sedimentary rock composed mainly of calcium carbonate.
Is marble harder than basalt?
No, basalt is generally harder than marble. Basalt is a mafic extrusive rock that has a higher hardness and durability compared to marble, which is a metamorphic rock.
Why is intrusive rock harder than a extrusive igneous rock?
The rocks are underground so intrusive rocks are under pressure so its harder.
Is bauxite harder than granite?
No, granite is harder than bauxite. Granite is a type of igneous rock that is known for its durability and hardness, while bauxite is a sedimentary rock that is softer in comparison.
How pedestal rock formed?
Pedestal rocks are usually formed in desert, when wind erosion wears away softer rock under-laying a harder rock. The harder rock is eroded at a slower rate than the softer rock.
Is sandstone or flint harder?
sandstone is not harder than flint because sandstone breaks in to smaller pieces.
What happens when softer rock erodes faster than harder rock?
When softer rock erodes faster than harder rock, it creates a landscape characterized by pronounced features such as cliffs or ledges, where the harder rock remains elevated compared to the surrounding terrain. This differential erosion can lead to the formation of valleys or depressions in the softer rock, while the harder rock may stand out as ridges or plateaus. Over time, this process contributes to the shaping of the topography, influencing drainage patterns and ecosystems in the area.
Is slate harder than shale?
Yes, slate is harder than shale. Slate is a fine-grained, foliated metamorphic rock that has undergone more intense heat and pressure than shale, a fine-grained sedimentary rock. As a result, slate is more durable and resistant to erosion compared to shale.
Which is harder obsidian or plain regular rock?
Impossible to say, not knowing the definition of plain regular rock. There are some rocks harder than obsidian, while many are softer.
If rock A cuts across rock B what does this indicate about their hardness?
If rock A cuts across rock B, it indicates that rock A is harder than rock B. Harder rocks are able to cut across softer rocks, indicating the relative hardness of the two rock types.
