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 is characterised by the appearance of circumscribed or diffuse, hard, smooth, ivory-colored areas that are immobile and which give the appearance of hidebound skin, a disease occurring in both localised and systemic forms: 1  Localised scleroderma.2  Localised morphea.eath occurs most often from lung, heart and kidney complications. In diffuse cutaneous disease, five-year survival is 70% and 10-year survival is 55%. The cause of scleroderma is unknown. It is an autoimmune condition, in which the body's immune system attacks healthy tissues.