essexite meaning in Hindi

Examples

1. It is made up of essexite which is popular for making curling stones.
2. It is essentially the volcanic equivalent of essexite.
3. The mountain is composed of essexite and syenite, strongly contrasting with the surrounding sedimentary rocks.
4. With a decrease in silica and reduction in olivine theralite grades into teschenite and with the addition of sodic feldspar, grades into essexite.
5. The rock of Salem, Massachusetts, United States, is a mica-foyaite rich in albite and aegirine : it accompanies granite and essexite.
6. The subvolcanic and intrusive rocks of the central Kaiserstuhl are plutonic equivalents of the erupted material ( essexite, carbonatite and coarse-granular phonolite ).
7. Typically, primitive melts of this composition form lamprophyre, lamproite, kimberlite and sometimes nepheline-bearing mafic rocks such as alkali basalts and essexite gabbros or even carbonatite.
8. Utilising the IUGS QAPF diagram of Streckeisen ( 1974 ) " essexite " is more formally known as nepheline monzodiorite or nepheline monzogabbro depending on the ratio of orthoclase to plagioclase and the abundance of nepheline.
9. We might in consequence regard them as varieties of syenite, diorite, gabbro, etc ., in which feldspathoid minerals occur, and indeed there are many transitions between syenites of ordinary type and nepheline  or leucite  syenite, and between gabbro or dolerite and theralite or essexite.