alkali basalt उदाहरण वाक्य

उदाहरण वाक्य

1. These felsic volcanics are understood to have been created by fractionation of mainly alkali basalt magma in crustal reservoirs.
2. Eight to ten sequences of columnar jointed alkali basalt comprise this unit and have a total thickness of } }.
3. The trachyte and comendite lavas are understood to have been created by fractionation of mainly alkali basalt magma in crustal reservoirs.
4. Basalt, alkali basalt, basanite, tephritic nephelinite, and nephelinite differ partly in the relative proportions of plagioclase and nepheline.
5. Alkali basalts form columnar jointed lava flows, peralkaline trachytes, pantellerites, comendites and rhyolites form the overlying stratovolcano and domes.
6. This comprises up to seven } } thick columnar cooling units of alkali basalt separated by buff-weathered vesicular lava flows.
7. The volcano is known to have produced at least four types of lava, namely alkali basalt, hawaiite, trachyte and trachybasalt.
8. Volcanism in the NCVP can be traced as far back as 20 million years ago with the emplacement of alkali basalt in western Yukon.
9. Initial volcanism produced a } } thick sequence of columnar jointed alkali basalt flows and altered grey-green vesicular basalts which form the lowest unit.
10. The chemical composition of these basalts can vary from tholeiite to alkali basalt within the same island group, but it is never calc-alkaline.