rock fragment

rock fragment

[′räk ‚frag·mənt]
(petrology)
A component of a sedimentary rock consisting of polymineralic or polygranular sand grains that are abraded particles of igneous, sedimentary, or metamorphic rocks.
References in periodicals archive ?
062 mm (phaneritic rock fragments, R) were interpreted as the constituent minerals of the rock fragment (Table 2).
Bivariant log-log plot of ratio of the polycrystalline quartz to feldspar plus rock fragment against ratio of total quartz to feldspar plus rock fragments (TABLE 6) is shown in FIGURE 11.
The forms of oxygen in the sample, described earlier this year in the Proceedings of the National Academy of Sciences, clearly identified the rock fragment as a CV3 carbonaceous chondrite, coming from an asteroid born during the earliest days of the solar system, 4.
Each count continued until a total of 100 quartz (Q), feldspar (F), and rock fragment (RF) grains were identified to establish the Q/F/RF ratio.
In the 2006 movie, Superman's arch enemy Lex Luthor steals a kryptonite rock fragment from the Metropolis Museum.
Lex Luthor, steals a kryptonite rock fragment from the Metropolis Museum.
chlorite biotite schist, clinozoisite feldspar rock fragment, altered feldspar-titanite-biotite replaced amphibole-clinozoisite rock fragment, amphibole-rich rock fragments, and garnet-banded biotite quartz rock fragment.
An example of a rock fragment fallen from a fractured zone and lodged in the borehole is shown in Figure 4.
1994) demonstrated that experimental data on the effects of rock fragment cover on soil erosion by water at the interrill plot scale cannot always be used to predict the impact of rock fragment cover on erosion [TABULAR DATA FOR TABLE 1 OMITTED] [TABULAR DATA FOR TABLE 2 OMITTED] rates at larger plot scales.
In one of the samples from this area, a kimberlite-like rock fragment, 20 x 15 x 9 mm in size was found.
The second reason is probably more likely in this instance because of the volcanic rock fragment input.