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 facts. 1  Scleroderma is a disease of the connective tissue featuring skin thickening that can involve scarring, blood vessel problems, varying degrees of inflammation, and is associated with an overactive immune system. 2  CREST syndrome is a limited form of systemic sclerosis.cleroderma is an autoimmune disease of the connective tissue characterized by skin thickening, spontaneous scarring, blood vessel disease, and varying degrees of inflammation, associated with an overactive immune system.