The grammatical form denoting more than one person, place, thing, or idea.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In the late 1800s, British geologist George Barrow mapped zones of index minerals in different metamorphic zones of an area that underwent regional metamorphism.
From Textbooks ● Jan. 1, 2017
Shock metamorphism can also produce index minerals, though they are typically only found via microscopic analysis.
From Textbooks ● Jan. 1, 2017
These index minerals also provide important clues to a rock’s sedimentary protolith and the metamorphic conditions that created it.
From Textbooks ● Jan. 1, 2017
As with all metamorphic rock, the parent rock texture and chemistry are major factors in determining the final outcome of the metamorphic process, including what index minerals are present.
From Textbooks ● Jan. 1, 2017
Chlorite, muscovite, biotite, garnet, and staurolite are index minerals representing a respective sequence of low-to-high grade rock.
From Textbooks ● Jan. 1, 2017
