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Rocks that have sharp edges are often formed from the cooling and solidification of magma. These cooling processes can occur quickly, resulting in the formation of sharp edges and angular shapes. Some examples of rocks that may have sharp edges include basalt, obsidian, and flint.
What else can I help you with?
How do you know if a rock has been in a river?
The force of the water will have worn it smooth, with no sharp edges.
Is the flint rock very hard?
Yes, slithers of which, when broken from a bigger lump (known as 'knapping') have sharp cutting edges.
Why knives scissors and nails have a sharp edges?
Knives and scissors have edges to cut things, but nails do not have sharp edges, they have points to penetrate hard surfaces.
What type of igneous rock is this dark volcanic rock shiny like glass with sharp edges?
The dark volcanic rock you are describing is likely obsidian. Obsidian is a naturally occurring glass formed from rapidly cooled lava, which gives it a shiny appearance and sharp edges. Its lack of crystalline structure is what differentiates it from other igneous rocks, and it is often used for cutting tools and decorative items.
What are a mix of of sharp angular pebbles?
A sedimentary rock called "breccia". The sharp angular pebbles making up the breccia could be igneous, sedimentary, or metamorphic. Breccias generally form close to the point of origin of the clast rock, having less time to round those sharp angular edges.
What process causes a rock with sharp edges to have rounded edges?
The process is called erosion, which involves the wearing away of rock surfaces through the action of water, wind, or ice over time. As the rock is exposed to these agents, they slowly break down the sharp edges, smoothing and rounding them in the process.
What sedimentary rock made up of rock fragments with sharp edges?
Conglomerate is a sedimentary rock made up of rock fragments with sharp edges, typically larger than 2 millimeters in size. These fragments are bound together by a matrix of finer-grained material, such as sand or clay.
How do you know if a rock has been in a river?
The force of the water will have worn it smooth, with no sharp edges.
Why do river stones round out?
Sharp edges are knocked off by the tumbling effect created by moving water, much as a mechanical rock polisher does via a rotating drum. As more and more sharp edges are rounded, and as the rock is abraded by much smaller rock particles being transported by running water, the effect is a rounded smoothed rock surface.
Is the flint rock very hard?
Yes, slithers of which, when broken from a bigger lump (known as 'knapping') have sharp cutting edges.
What rock is actually glass and has sharp edges?
Obsidian is a type of volcanic glass that is formed when lava cools rapidly. It typically has a black or dark brown color and has sharp edges due to its lack of crystalline structure. Obsidian is often used in making tools and weapons due to its sharpness.
Why knives scissors and nails have a sharp edges?
Knives and scissors have edges to cut things, but nails do not have sharp edges, they have points to penetrate hard surfaces.
What type of igneous rock is this dark volcanic rock shiny like glass with sharp edges?
The dark volcanic rock you are describing is likely obsidian. Obsidian is a naturally occurring glass formed from rapidly cooled lava, which gives it a shiny appearance and sharp edges. Its lack of crystalline structure is what differentiates it from other igneous rocks, and it is often used for cutting tools and decorative items.
Why do rocks fragments carried by glacier not lose their sharp edges?
The rocks are frozen solid therefore there Sharp edges are not lost
What are a mix of of sharp angular pebbles?
A sedimentary rock called "breccia". The sharp angular pebbles making up the breccia could be igneous, sedimentary, or metamorphic. Breccias generally form close to the point of origin of the clast rock, having less time to round those sharp angular edges.
Jolene is comparing a rock from a riverbed and a rock from deep underground one is very smooth the other has very sharp edges explain which rock was probably found in each location?
The rock that is very smooth is most likely the one that was found in riverbed because the river would probably toss the rock around and weather it down until it is smooth. Therefore, that means that the other rock was most likely found underground.
What rocks are a mix of sharp angular pebbles?
A sedimentary rock called "breccia". The sharp angular pebbles making up the breccia could be igneous, sedimentary, or metamorphic. Breccias generally form close to the point of origin of the clast rock, having less time to round those sharp angular edges.
