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Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase . [ 1 ] Trondhjemites that occur in the oceanic crust or in ophiolites are usually called plagiogranites .
Tonalite–trondhjemite–granodiorite (TTG) rocks are intrusive rocks with typical granitic composition (quartz and feldspar) but containing only a small portion of potassium feldspar. Tonalite , trondhjemite , and granodiorite often occur together in geological records , indicating similar petrogenetic processes. [ 1 ]
Trondhjemite is an orthoclase-deficient variety of sodium-rich tonalite with minor biotite as the only mafic mineral, named after Norway's third largest city, Trondheim. [7] Tonalites, together with granodiorites, are characteristic of calc-alkaline batholiths formed above subduction zones. [8]
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Did you know that mineral oil can be used to remedy a range of everyday complaints, ranging from dry skin to a flaky scalp? Yep, it might just be one of the most versatile products in your beauty ...
The ancient Romans often used olive oil to seal their stone. Such treatment provides some protection by excluding water and other weathering agents, but it stains the stone permanently. During the renaissance Europeans experimented with the use of topical varnishes and sealants made from ingredients such as egg white, natural resins and silica ...
How Do You Use the Self-Cleaning Oven Feature? In most cases, modern technology is going to make your life easier and your oven clean. But before you hit the self-cleaning oven button to activate ...
Ballistol as liquid and as aerosol. Ballistol (meaning 'Ballistic Oil') is a mineral oil-based chemical which advertises that it has many uses.It is manufactured and distributed by Ballistol GmbH in the Bavarian village of Aham and was originally intended for cleaning, lubricating, and protecting firearms.