4, Table 1): (1) dolostone group including 23 samples; (2) dolomitic marlstones represented by 17 samples; (3) the group of mixed carbonate-siliciclastic rocks including 9 cement-rich siltstone samples, 8 cement-supported sandstone samples, 6 samples of dolomitic marlstone rich in detrital
minerals, and 1 dolostone sample, the last one containing abundant detrital
-rich interlayers; (4) siliciclastic rocks represented by 23 sandstone and 9 siltstone samples with grain-supported texture.
2] implies an organic source of silica and a detrital
origin of quartz.
zircon geochronology by Laser-Ablation Multicollector ICPMS at the Arizona LaserChron Center.
zircon results for the Lumsden Dam Formation (Fig.
zircon data from the Estonian sandstones (Poldvere et al.
That occurs particularly after an algal bloom when high amounts of detrital
organic matter settled onto surface sediments and are degraded by bacterial activity.
3), those losses being more likely to have resulted from extracellular digestion of detrital
material within the stomach, associated with enzymes released during the mechanical action and turnover of crystalline style (Owen 1956, Gelder & Robinson 1980, Lucas & Newell 1984).
3] (Figure 10), it thus seems reasonable to suggest that much of the rock's Zr composition was probably not introduced as detrital
zircon but also formed parts of the rock's silicate fraction.
In March 2010, Dynasty announced initial JORC-Compliant Inferred Resources of 453 million tonnes of Detrital
Channel Iron and 23.
Biological and environmental scientists cover the Breitenbach and its catchment, environmental characteristics, detrital
energy sources, primary producers, bacteria and fungi, fauna, and ecosystem Breitenbach.
Earlier studies that determined the root - all that remains of an earlier mountain chain - was at least Precambrian in age relied on indirect evidence: outcrops exposed to the north of the mountains, detrital
zircons retrieved from ice cores, and seismic measurements that revealed a crustal thickness of 45 to 60 kilometers.
The geology of the study sites consists predominantly of Paleozoic granitic intrusions with detrital
sedimentary rocks and low grade metamorphosed sediments.