Trachyte Thin Section
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When purchased individually each 27 x 46 mm slide is packaged as an explano mount with a study sheet in a durable plastic sleeve.
Trachyte thin section. Tiny lath shaped sanidine crystals are closely packed in parallel fashion and form flow lines that tend to wrap around the large phenocrysts. The trachyte mesa tm sill laccolith is 2 km long and 0 5 km wide. In the ne the intrusion is much more sill like with evidence for 1 3 stacked sheet like sills and is only 5 10 m thick.
In addition you can now order matching hand specimens for each thin section. Trachyte trachyte is a fine grained and generally light colored volcanic rock that usually has a rough surface to the touch which is the reason it was given that name trachys is rough in the greek. Classic north american rock thin sections our finest thin sections have been a classroom standard for over 40 years.
When purchased individually each 27 x 46 mm slide is packaged as an explano mount with a study sheet in a durable plastic sleeve. Learn more in these related britannica articles. Trachytes are composed chiefly of alkali feldspar with minor amounts of dark coloured minerals such as biotite amphibole or pyroxene.
It is the volcanic equivalent of syenite. Classic north american rock thin sections our finest thin sections have been a classroom standard for over 40 years. Trachyte is an extrusive igneous rock composed mostly of alkali feldspar it is usually light colored and fine grained with minor amounts of mafic minerals and is formed by the rapid cooling of lava enriched with silica and alkali metals.
Microscopic examination of thin sections reveals the trachytic texture of the fine matrix.
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