What type of rock is grey with white veins along the BOTTOM of the walls? What is the rock's origin?
To determine the type of rock that is grey with white veins along the bottom of the walls and its origin, you can follow these steps:
1. Look for visible characteristics: Start by closely examining the rock's physical properties. Note the color, texture, and any visible features such as white veins. Grey rocks with white veins can be found in various types of rocks, so further analysis is needed.
2. Compare with common rock types: Based on the description, one possibility could be marble. Marble is a metamorphic rock that often has a greyish color with white veins running through it. However, it's important to consider other possibilities as well.
3. Conduct a hardness test: Marble has a relatively low hardness, which means it can be easily scratched by a metal object like a knife. Conducting a hardness test can help determine if the rock in question is indeed marble.
4. Perform a streak test: Another test that can be done is a streak test. Rub the rock against a hard, porcelain surface. If it leaves a white streak, it could further suggest that it is marble.
5. Research the rock's origin: Once you have identified the rock as possibly being marble or another type, you can investigate the origin. Marble forms from limestone that is subjected to high heat and pressure deep within the Earth's crust. Regions known for marble production include Italy, Greece, Turkey, and the United States, among others.
By following these steps, you should be able to determine the type of rock and its origin. However, it's important to note that without directly observing and testing the rock, it can be challenging to determine its exact type and origin. It might be beneficial to consult with a geologist or bring a sample to a professional for more accurate identification.