Sentence examples for unaltered rock from inspiring English sources

Skins increase surface area, where sorption occurs, compared to the unaltered rock matrix.

The altered and unaltered rock samples were collected at Toki granitic rock, central Japan.

XRD patterns show that clay minerals were not present in the unaltered rock samples, but were in the altered ones.

Both the altered and unaltered rock samples contain apatite, zircon and xenotime, which contain REEs as minor components.

Volcanic material presents a range from the unaltered rock of the most recent eruptions to the well-developed fertile soils on surfaces that have been exposed for longer periods of time.

But a group of researchers has found that at least some of the most primitive, unaltered rock in the solar system contains no diamond star dust at all.

Plagioclase is metamorphic in character and generally richer in albite than in the unaltered rocks.

Geological field observations evidence that active and fossil Icelandic hydrothermal systems are typically embedded into an intercalation of almost completely altered and nearly unaltered volcanic rock layers.

Mori et al. (2014) evaluate bleaching processes of pelite in serpentine mélanges by studying the chemical composition of a bleached and unaltered sedimentary rock at the reaction boundary between the surrounding chlorite schist and metapelite.

Nevertheless, a broad classification is possible according to which clays, shales, sands and gravel, compact sandstones and limestones, and unaltered crystalline rocks stand to increase resistivity (Sharma 1997).

The project, which is running under the auspices of the International Ocean Discovery Program (IODP), would give scientists access ultimately to fresh, unaltered peridotite - the rock, rich in olivine minerals, that, because of the size of the mantle, makes up the bulk material of the planet's interior.