This tiny cluster of bacteria is methicillin-resistant Staphylococcus aureus (MRSA), seen under a microscope. This strain of the common staph bacteria causes infections in different parts of the body -- including the skin, lungs, and other areas. MRSA is sometimes called a superbug because it doesnât respond to many antibiotics. Though most MRSA infections are minor, some can be life-threatening.
Granite is an igneous rock that injects, or intrudes, as magma into Earth's crust and then cools. It consists of four main mineral compounds. Two of these are types of feldspar, a group of silica compounds that constitute the most abundant mineral group on Earth.ranite is an igneous rock that injects, or intrudes, as magma into Earth's crust and then cools. It consists of four main mineral compounds. Two of these are types of feldspar, a group of silica compounds that constitute the most abundant mineral group on Earth.
This process is called metamorphism, and the resulting rocks are called metamorphic rocks, which means changed or altered rocks. By metamorphism, granite has often been changed to gneiss, the pressure having caused the granite to squeeze out or flow, so as to develop a somewhat stratified appearance, conspicuous minerals like black mica having been pressed out and gathered into layers of concentration.