Intrusive Rocks. Igneous rocks which form by the crystallization of magma at a depth within the Earth are called intrusive rocks. Intrusive rocks are characterized by large crystal sizes, i.e., their visual appearance shows individual crystals interlocked together to form the rock mass.gneous rocks which form by the crystallization of magma at a depth within the Earth are called intrusive rocks.
Marja /mar-ja/ [2 sylls.] as a girls' name is of Latin derivation, and the meaning of the name Marja is star of the sea; pearl.Marja is a variant transcription of Maria (Latin). Marja is also a variant of Marjorie (English, French, Greek): version of the French Margery.Marja is also used as a form of Mary (Latin). Kreatif forms: Marma, Merja, Merrja.arja is a variant transcription of Maria (Latin). Marja is also a variant of Marjorie (English, French, Greek): version of the French Margery. Marja is also used as a form of Mary (Latin).
The Mid-Atlantic Ridge (MAR) is a mid-ocean ridge, a divergent tectonic plate or constructive plate boundary located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world.lthough the Mid-Atlantic Ridge is mostly an underwater feature, portions of it have enough elevation to extend above sea level. The section of the ridge that includes the island of Iceland is also known as the Reykjanes Ridge. The ridge has an average spreading rate of about 2.5 cm per year.