Paper & Publication · publication-09
A2–B1, A1 and roof intervals
This page completes the upper succession: fine heterolithic A2–B1 strata pass into the mudstone–shale roof and the variable 3–10 m Seam A1, with A1–A2 interburden containing fine, locally tuffaceous sandstone. The vertical change is real at the sampled wells; its lateral persistence is interpretive.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
This page completes the upper succession: fine heterolithic A2–B1 strata pass into the mudstone–shale roof and the variable 3–10 m Seam A1, with A1–A2 interburden containing fine, locally tuffaceous sandstone. The vertical change is real at the sampled wells; its lateral persistence is interpretive. A tuffaceous marker can be useful, but only mineralogical or geochemical correlation can demonstrate that it is one event horizon rather than compositionally similar beds deposited at different times.
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- Private publication archive · controlled source record
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- Source-linked record
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- HD
- Record ID
- publication-09
