References in periodicals archive ?
Gamma ray logging is a kind of nuclear measure of natural radioactivity in formations and can be used to identify lithologies, correlating zones and determination shale (clay) volumes (Track 2 - Figure 3).
Fullagar 1994; Hiscock 1998; Hiscock & Clarkson 2000; Holdaway & Stern 2004; Mulvaney 1977) has increasingly focused on the spatial relationship between stone artefacts and their sources, and the apparent preferential selection of some lithologies for particular types of artefacts.
Bivariate plots of [kappa], [rho], and Q value distributions for all samples sorted for major lithologies are shown in Figures 7 and 8, respectively.
A single log data can not produce accurate porosity values; hence, combination of neutron-density log and the cross-plots are used to mark lithologies. The porosity of the Warchha Sandstone is calculated with the help of the neutron and density logs data as shown in Fig.
Lower areas are represented by more friable lithologies, formed by siltstones and sandstones of the Rio do Rasto Formation that outcrop in the central-southern area (Figure 1).
(1997) suggests that the Precambrian lithologies have undergone multiple (pre-Carboniferous) erosive and transport events and are present as clasts and boulders within the younger Carboniferous conglomerate units.
Both the quartz-muscovite and talc schists are common lithologies in the schist melange unit.
Where several lithologies for the geological unit were listed, the first was assumed to be dominant, unless other information was available.
The Clayton-Porters Creek contact is conformable and so the two lithologies are intercalated.
Metapelitic, metagreywacke, and amphibolite lithologies from both study areas were analyzed with the microprobe for assemblages: Ga+Bi+Pl+Mu, Ga+Hbl+Pl, and Ga+Cpx+Pl.
In addition to converting an oil/gas industry drillship and outfitting it for scientific coring, the Ocean Drilling Program's Engineering and Operations team began in 1984 to plan for the difficult and wide range of lithologies and conditions to be encountered.
Channel samples are designed to intersect targeted lithologies across known strike of lithologies being sampled.
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