, the dominating thick finely laminated uniform siliceous-carbonate mudstone (MS) oil shale intercalates with variable intervals of grain-bearing oil shale, in which interbeds of proper mudstone alternate with laminae, lenses and thin interbeds of wackestone (WS).
, the Lower Angeles corresponds with a vesicular andesitic-basaltic lava, with a hypocristalline porphyritic to glomeroporphyritic texture, with phenocrystals of plagioclase, clinopyroxene, orthopiroxene, olivine and opaque crystals.
, these rocks vary from actinolite schists to epidote-bearing actinolite schists, quartz-actinolite schists, epidote-bearing quartz-actinolite schists and epidote-bearing tremolite-actinolite schists.
The body is occupied by petrographically
uniform granite composed of perthite, albitic plagioclase, quartz, and small quantities of biotite, opaque oxide and titanite.
identical samples of so-called "Silasia granite" were medium-grained biotite granite with allotriomorphic grains (quartz, feldspar) with the exception of biotite (hypidiomorphic) and directionless structure.
In this study 20 carbonate samples of Late Ladinian age, located between meters 40 and 120 of the section of Figure 2, representing tidal flat to offshore transition zone environments, have been characterised petrographically
They included the western (granitic) pluton in the Creignish Hills pluton, to which it is petrographically
similar, and inferred a similar ca.
Number of vessels reconstructed and fragmentary samples analyzed petrographically
Six soil profiles from four petrographically
different areas in south-west Germany, a region characterised by a humid-temperate climate, were selected for the first runs of the new sequential extraction procedure, both to evaluate the method and to quantify the different Si-pools in the soil profiles.
the section was discriminated between accretionary lapilli tuffs, fine hyaloclastite tuffs and mudstones cycles.
The concrete cores of three dams were also obtained and studied petrographically
, this facies has about 63% quartz grains, and the remaining about 27% is fine grained matrix.