Recording features of sedimentary rocks and constructing graphic logs - Geological Field Techniques - page 128

6
Figure 6.11 Example of a
generalized graphic log from a
fi eld notebook incorporating, in
part, the beds shown in Figures
6.4 and 6.6. (Angela L. Coe, The
Open University, UK.)
• Are there key sedimentary structures and fossils that
indicate relative water depth and/or processes of deposition
(e.g. hummocky cross-stratifi cation, non-marine fauna)?
• Are there any repetitions?
• Are there any large-scale features (e.g. river channels,
intrabasinal highs, depocentres next to synsedimentary faults)?
• Is there lateral continuity of the facies and is the method of
correlation robust?
A description of the typical facies in the range of possible
sedimentary environments is beyond the scope of this topic. A
good summary is provided by Stow (2005) and most textbooks