because the weather break down the rock until it gets soft like chalk
Please describe what you mean by soft and rephrase the question.
Generally speaking, when a geologist talks of "soft rocks" and "hard rocks" what he or she means is "sedimentary rocks" or "igneous and metamorphic rocks". Limestone is a sedimentary rock, and compared to most other rocks, is relatively soft. lol Different limestones have different hardnesses. Most "marbles" are actually hard limestones, because they have not experienced the high pressures and temperatures required for metamorphism.
The materials in soft rocks are soluble or also dissolvant. So anyway, they are made of many materials like hematite that is mostly in almost all of the rocks on the Earth....... In conclusion, the answer is that hematite is the most reasonable because it is the softest mineral found....... My bibliography: google.com, ask.com, yahoo.com, and books from the library... (I know this because I did this for homework..... hehehe)
When rocks undergo weathering, they become smaller in size and break down into smaller pieces called sediments. These sediments can eventually be transported and deposited in new locations, where they may become compacted and cemented together to form sedimentary rocks.
Rocks that are subjected to weathering and erosion at the Earth's surface eventually become sedimentary rocks. These rocks form from the accumulation and cementation of sediments such as sand, silt, and clay that have been weathered and eroded from pre-existing rocks.
Please describe what you mean by soft and rephrase the question.
hiya
Because sedimentary rocks are soft rocks
Hard matrix is supposed to be used for digging hard rocks and soft matrix for soft rocks. It's quite confusing to me
i am not sure......
It can become many different rocks and minerals depending on how fast it cools. The faster it cools; the harder and darker-colored the rock will be. The slower it cools the more soft and light-colored the rock will be.
Erosion and weathering will cause rocks to become rounded.
By weathering
No. It's the Metamorphic rocks that melt and become magma.
Erosion causes them to become smooth from wear.
now they are rocks before there werent rocks
Metamorphic rocks become igneous rocks by melting from heat and pressure, remnants of which may cool from melt (magma) and become components of igneous rock.