When it comes to differentiating between two rocks, the properties of each can help determine which one is a better fit for any given situation. Andesite and basalt are two types of rock that you may come across in your search for the perfect stone for your project. Though there is some overlap in the properties of both rocks, there are some differences as well. Here is an examination of which one of the following statements is not true about andesite and basalt.
- Andesite is the most abundant volcanic rock, while basalt is the most common type of volcanic rock – This statement is true. Andesite is the most abundant volcanic rock, making up the majority of the upper layers of the Earth’s crust. Basalt is the most common type of volcanic rock found in oceanic areas, though it can be found in some parts of the continental crust as well.
- Andesite is more mafic than basalt – This statement is true. Mafic rocks are rocks that have a higher concentration of magnesium and iron. Andesite is richer in iron and magnesium than basalt, making it more mafic.
- Andesite has a higher melting point than basalt – This statement is false. The melting point of basalt is higher than that of andesite, at 1,085 degrees Celsius compared to 1,050 degrees Celsius.
- Andesite is more ductile than basalt – This statement is false. Basalt is more ductile than andesite, meaning it can be stretched and bent more easily. Basalt is also more flexible, making it better suited for use in construction materials when compared to andesite.
Andesite and basalt have different properties, making each one useful for different purposes. Knowing which statement is not true about andesite and basalt can help you choose the right rock for your project. For instance, andesite is better suited for high-temperature projects, while basalt is better suited for projects that require more flexibility and ductility.