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Hardness in a rock has different meanings. Although sandstone, a sedimentary rock, may be composed of quartz grains (relatively hard on the Mohs scale of mineral hardness), it might be loosely cemented by calcite crystals which are not so hard, making it crushable by the squeeze of a hand. There are other well cemented sedimentary rock types that are very resistant to breaking, however. Certain limestones, breccias, conglomerates, and sandstones take great effort to break into smaller pieces. In general though, geologists will refer to sedimentary rock as soft rock, and igneous rock as hard rock. Igneous rock has an interconnected crystalline structure which makes it very resistant to fracture.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoSedimentary rocks can be hard or soft. In the hard way it is shaped as a crystal structure. Sandstones are hard though. SO its hard and soft.
Further answer
Actually, sandstone may be hard or soft, depending on how it came about. And none are crystalline apart from the small sand crystals that are bound together to form the rock. Some sandstones are so hard they are good for building. But some are so soft you can wear them away with your finger. Although the sand particles that got deposited are themselves hard, they are glued together by different chemicals, some of which are very tenacious and make the resulting rock hard. But some are not and the rock is soft. Same with limestone, some is hard but some is very soft
Wiki User
∙ 13y agoYes. All rocks are hard
2nd Answer:
Some rock, like sandstone, is less hard than others.
3rd answer:
The word "hard" is subjective. What might be "hard" to you or in certain situations might not be hard to others or in other situations.
The word "hardness" is a measurable quantity. Geologists often measure "hardness" using a field scale, called Moh's hardness, where diamonds have a hardness of 10 and Talc has a hardness of 1. Talc is a sedimentary rock and in my opinion not hard at all.
Lyrian Aly
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∙ 10y agohard
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∙ 8y agohard
Anonymous
soft
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Are there any fossils in sedimentary rocks?
Yes all fossils occur in sedimentary rocks or rocks that began as sedimentary rocks.
Rocks formed from weathered debris from preexisisting rocks are called?
They are called clastic sedimentary rocks.
Are sedimentary rocks classified tofoliated sedimentary rocks?
Metamorphic rocks are classified by foliation or lack there of, not sedimentary rocks. They are classified into Clastic Sedimentary, and Chemical Sedimentary.
Do all sedimentary rocks bubble in acid?
No. Only sedimentary rocks containing carbonate minerals will bubble with acid.
What is the texture of inorganic land derived sedimentary rocks?
what is the texture of all inorganic land derived sedimentary rocks
What is the look and feel of sedimentary rocks?
the look and feel of sedimentary rocks are sometimes hard and smooth or hard and rough
Are there any fossils in sedimentary rocks?
Yes all fossils occur in sedimentary rocks or rocks that began as sedimentary rocks.
How hard are sedimentary rocks?
harder than metamorphic
Rocks formed from weathered debris from preexisisting rocks are called?
They are called clastic sedimentary rocks.
What else can sedimentary rocks form from?
All rocks can form from sedimentary because the rock cycle is endless.
What kind of rocks can produce metamorphic rocks?
All sedimentary and igneous rocks
Gravel sandstone and conglomerate are all types of?
Gravel, sandstone, and conglomerate are all types of sedimentary rocks.
Are sedimentary rocks classified tofoliated sedimentary rocks?
Metamorphic rocks are classified by foliation or lack there of, not sedimentary rocks. They are classified into Clastic Sedimentary, and Chemical Sedimentary.
Do all sedimentary rocks bubble in acid?
No. Only sedimentary rocks containing carbonate minerals will bubble with acid.
What is the texture of inorganic land derived sedimentary rocks?
what is the texture of all inorganic land derived sedimentary rocks
Are sedimentary rocks interlocking or non-interlocking?
Sedimentary rocks are non-interlocking, whereas Igneous and Metamorphic rocks are all interlocking.
What rock makes up ten percent of all sedimentary rocks?
Limestone makes up ten percent of all sedimentary rocks.
