· 1 Answer. Shale is a finegrained sedimentary rock whose original constituents were clay minerals or muds. It is characterized by thin laminae [1] breaking with an irregular curving fracture, often splintery and usually parallel to the oftenindistinguishable bedding plane. This property is called fissility.

Marble Marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures. Marble forms under such conditions because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals. The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the ...

 · When I did a bit of searching on the web, I found that some people thought that stone was more British; that rock could be hard and soft, whereas stone was always hard; that stones are smooth and rocks rough; and that stones are small and rocks are big. In his wonderful book, Stone by Stone, Robert Thorson writes "Rock is raw material in situ. Stone usually connotes either human handling or

 · Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite. How can you identify limestone? Limestone is a very hard rock, so try and crumble it in your hand or fingers. If it starts to come off in your hand, then you don't have limestone. It is very possible that if you have limestone you have something that has fossil imprints in it. See ...

The Rock Cycle (KS3) | Types of Rock | Sedimentary Rocks | Limestones. Limestones. Limestones are made up largely of calcite (calcium carbonate) as their main mineral. Limestones fizz when a drop of dilute hydrochloric acid is placed on them. Uses of Limestone. Shelly limestone Shelly limestone is made up of the shells and skeletons of invertebrates that live in the sea (or sometimes in fresh ...

is limestone a soft or hard rock . Is limestone hard rock or soft rock The QA wiki . 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". Reply. Is lime stone a soft or hard rock . Get Price ; 3 Types of Rock for Climbing: Granite, Sandstone Limestone. Limestone is composed of aragonite .

Limestone: Limestone is a sedimentary rock that is formed from the accumulation of the skeletal remains of dead, marine animals. It is mostly composed of the chemical calcium carbonate.

 · Limestone is usually gray, but it may also be white, yellow or brown. It is a soft rock and is easily scratched. It will effervesce readily in any common acid. What is the purpose of limestone? Limestone has numerous uses: as a building material, an essential component of concrete (Portland cement), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste ...

is limestone a hard rock. Hardscaping 101: Limestone Pavers: Gardenista . Above: Randomly shaped limestone pavers from India at American Soil and Stone. Photograph by Ellen Jenkins. There is a broad spectrum of limestone colors: from dark ... is limestone a soft or hard rock Coal Surface Mining . Is limestone hard rock or soft rock . Generally speaking, when a geologist talks of "soft rocks ...

Answer (1 of 6): Both limestone and marble are soft stones, falling at the lower end of the Mohr's Hardness Scale. This quality makes them easier and less expensive to work and shape into useful forms than harder stones with nominally higher durability. The Parthenon, the Lincoln Memorial, the W...

 · This stone has a soft structure, which makes it really sensitive against scratches. The acidic substances, harsh cleaning agents, sharp edges and tools can easily damage the limestone made materials. This rock has a gray color in general, but it is also available in other natural colors like white, yellow, light brown and dark brown. People usually prefer to use limestone in their homes to add ...

Bath Stone is an oolitic limestone comprising granular fragments of calcium obtained from the Combe Down and Bathampton Down Mines under Combe Down, Somerset, England, its warm, honey colouring gives the World Heritage City of Bath, England, its distinctive important feature of Bath Stone is that it is a 'freestone', socalled because it can be sawn or ...

 · Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. These rocks are composed of many distinct minerals. What type of limestone is chalk? Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of submicroscopic plankton which had fallen ...

Grade 1 – Very hard rock (basalt, diabase) Grade 2 – Hard rock (granite, gneiss) Grade 3 – Medium hard rock (quartzite, pebble) Grade 4 – Soft Rock (limestone) Share. Tweet. Share. Pin. 0 Shares. More You May Like. Why Desert Sand Cannot be Used As Building Materials; What is Quartz Sand | How Many Types of Quartz Sand; 33 Tips About Artificial Sand You Need To Know ; 10 Belt Conveyor ...

The soft rock is made of clay and sands, and the hard rock is chalk and limestone. The bands of soft rock erode more quickly than those of the more resistant hard rock leaving a section of land ...