Igneous rocks are formed from the solidification of molten rock material. There are two basic types. Intrusive igneous rocks crystallize below Earth's surface, and the slow cooling that occurs there allows large crystals to form. Examples of intrusive igneous rocks are diorite, gabbro, granite, pegmatite, and peridotite.
Systemic sclerosis or systemic scleroderma is an autoimmune or connective tissue disease. It is characterized by thickening of the skin caused by accumulation of collagen, and by injuries to the smallest arteries.ystemic sclerosis or systemic scleroderma is an autoimmune or connective tissue disease. It is characterized by thickening of the skin caused by accumulation of collagen, and by injuries to the smallest arteries.
Scleroderma refers to a group of rare chronic autoimmune diseases in which the skin and connective tissues tighten and harden; it is a progressive disease. The skin and connective tissues are fibers that make up the framework that supports the body.t is worse for diffuse cutaneous scleroderma, especially for elderly male patients. Pulmonary, heart and/or kidney complications are the most common causes of death. A symptom is something the patient feels and reports, while a sign is something other people, such as the doctor detect.