Changes

Millimeter-to-centimeter-scale observations of mudstone strata and their stacking patterns are recorded keeping track of the abundance of each physical, biological, and chemical attribute. One can then recognize laminae, laminasets, beds, and bedsets, and aggregate these observations into facies, facies associations, and facies-association successions<ref name=Bhcsea2014 /><ref name=Lzrea2015a /><ref name=Lzrea2015b />. An example of a description form and symbols we use to capture lamina-to-bedset-scale observations in mudstone successions is given in [[:file:M126CH03-Figure2.jpeg|Figure 2]]. Such a form clearly separates observations from interpretations, along with differentiating the various levels of interpretations; it captures observations on the left side; first to the right are lower level interpretations (e.g., sedimentary structures) and then higher level interpretations (e.g., benthic-energy and oxygen levels, depositional environments; [[:file:M126CH03-Figure2.jpeg|Figure 2]]).

Millimeter-to-centimeter-scale observations of mudstone strata and their stacking patterns are recorded keeping track of the abundance of each physical, biological, and chemical attribute. One can then recognize laminae, laminasets, beds, and bedsets, and aggregate these observations into facies, facies associations, and facies-association successions<ref name=Bhcsea2014 /><ref name=Lzrea2015a /><ref name=Lzrea2015b />. An example of a description form and symbols we use to capture lamina-to-bedset-scale observations in mudstone successions is given in [[:file:M126CH03-Figure2.jpeg|Figure 2]]. Such a form clearly separates observations from interpretations, along with differentiating the various levels of interpretations; it captures observations on the left side; first to the right are lower level interpretations (e.g., sedimentary structures) and then higher level interpretations (e.g., benthic-energy and oxygen levels, depositional environments; [[:file:M126CH03-Figure2.jpeg|Figure 2]]).

[[file:M126CH03-Figure2.jpeg|thumb|300px|{{figure number|2}}2A. Example of a form that we recommend using to capture the key attributes of mudstones observed in cores. 2B. Example of symbols useful for capturing mudstone observations in cores and hand specimens (after Lazar et al. <ref name=Lzrea2015b /> used with permission).

[[file:M126CH3-Figure2.jpeg|thumb|300px|{{figure number|2}}2A. Example of a form that we recommend using to capture the key attributes of mudstones observed in cores. 2B. Example of symbols useful for capturing mudstone observations in cores and hand specimens (after Lazar et al. <ref name=Lzrea2015b /> used with permission).

=====Observations=====

=====Observations=====

Key attributes to capture include the following (see also [[:file:M126CH03-Table2.jpeg|Table 2]] and [[Mudstone nomenclature]] and [[Laminasets, beds, and bedsets]]:

Key attributes to capture include the following (see also [[:file:M126CH3-Table2.jpeg|Table 2]] and [[Mudstone nomenclature]] and [[Laminasets, beds, and bedsets]]:

[[file:M126CH03-Table2.jpeg|thumb|300px|’’Table 2.’’ Mudstone Attributes Most Useful for Sequence-stratigraphic Analyses.]]

[[file:M126CH3-Table2.jpeg|thumb|300px|’’Table 2.’’ Mudstone Attributes Most Useful for Sequence-stratigraphic Analyses.]]

* Depth or elevation

* Depth or elevation