So not all rocks are formed like sedimentary rocks. There are two other types ... are called igneous ‘intrusions’ because it intrudes into other rock layers. They can form in different shapes ...

BAS, M. J. LE 2001. Report of the Working Party on the classification of the lunar igneous rocks. Meteoritics & Planetary Science, Vol. 36, Issue. 9, p. 1183.

IN the middle of the last century much interest was shown in the problem of the genesis of igneous rocks, and especially in the manner of origin of diverse rock-types from a common stock or from a ...

The Atlas of Minerals and Igneous and Metamorphic Rocks in Thin-section provides ... Chapters highlight the distinctive characteristics used to identify different minerals. Building on this base, ...

Abstract: Apatites crystallized from different types of igneous rocks show significant variations in the abundances of some minor and trace elements. In this study, electron probe microanalysis and ...

Abstract: In this paper we classify the range of feldspathic igneous rocks using five geochemical variables: the FeO/(FeO + MgO) ratio or Fe-index, the modified alkali–lime index, the ...