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 causes the body to produce too much collagen. Collagen is a protein that makes up connective tissues, such as the skin. Too much collagen can make the skin stretch, harden and thicken, and can also cause damage to internal organs, such as the heart, lungs and kidneys.There are 2 types of scleroderma: localized and systemic.Localized scleroderma affects the skin only.oo much collagen can make the skin stretch, harden and thicken, and can also cause damage to internal organs, such as the heart, lungs and kidneys. There are 2 types of scleroderma: localized and systemic.