nephelinite वाक्य
उदाहरण वाक्य
मोबाइल
- Nephelinite is an example of a silica-undersaturated igneous rock.
- Nephelinite is exposed on the islands but is extremely rare.
- Benmoreite, nephelinites, pantellerites and kulaite are found here.
- These include nephelinite, basanite and peralkaline phonolite, trachyte and comendite lavas.
- Olivine nephelinite has been collected near these basalts.
- A normative feldspathoid classifies a rock as silica-undersaturated; an example is nephelinite.
- Nephelinite is yet richer in Na 2 O plus K 2 O compared to SiO 2.
- The origin of the volcanism is unknown, but is probably related to olivine nephelinite occurs.
- An example is the Hamada nephelinite lava flow in southwest Japan which occurred in the late Miocene age.
- Nephelinite is also associated with the highly alkalic volcanism of the Ol Doinyo Lengai volcanic field in Tanzania.
- The lava at Volcano Mountain is called olivine nephelinite, which is a very uncommon type of lava.
- Nyiragongo, another African volcano known for its semipermanent lava lake activity, erupts lava made of melilite nephelinite.
- There are at least four types : alkali olivine basalt, quartz tholeiite, alkaline basalt, and olivine nephelinite.
- Nephelinite is found on ocean islands such as Oahu, although the rock type is very rare in the Hawaiian islands.
- Basalt, alkali basalt, basanite, tephritic nephelinite, and nephelinite differ partly in the relative proportions of plagioclase and nepheline.
- Basalt, alkali basalt, basanite, tephritic nephelinite, and nephelinite differ partly in the relative proportions of plagioclase and nepheline.
- On the southern part of the Central Plateau, there are olivine melilite nephelinite, olivine nephelinite, quartz tholeiite lava flows.
- On the southern part of the Central Plateau, there are olivine melilite nephelinite, olivine nephelinite, quartz tholeiite lava flows.
- On the east side of the Central Plateau an olivine nephelinite is from, and a flow of nepheline hawaiite is from.
- Other igneous rocks such as nephelinite are present in small quantities; these occur often on the older volcanoes, most prominently Detroit Seamount.
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