Stratigraphic lapout geometry
This post about lapouts (onlap, toplap, downlap, offlap, truncation) is a companion to Clinoforms and clinothems An important part […]
Interpreting ancient environments
Clinoforms and clinothems
Earth’s surface is a time plane. It is a plane of deposition and erosion, of chemical precipitation and dissolution, domicile to countless
Stratigraphic trends and stacking patterns
Stratigraphic trends in outcrop and core, and the role they play in identifying parasequence stacking patterns. Recognition of stratigraphic trends,
Shorelines and shoreline trajectories
A brief look at identifying shoreline trajectories in stratigraphic successions. This post is part of the How To…series on Stratigraphy
Parasequences
Parasequences are the building blocks of shallow marine systems tracts. The stratigraphy of ancient, shallow marine deposits is commonly
How to do things, In the field, Interpreting ancient environments
Sequence stratigraphic surfaces
A brief look at the key stratigraphic surfaces that help us construct sequence stratigraphic models. Look at any pile of
Stratigraphic cycles: What are they?
Stratigraphic repetition, stratigraphic cycles, and stratigraphic trends We know with reasonable certainty that the sun will rise tomorrow. We know
Autogenic or allogenic dynamics in stratigraphy?
Or why the distinction between allogenic and autogenic dynamics is not as straight forward as we might think! Stratigraphic analysis
Spheroidal and honeycomb weathering
One of the beaches we frequent, off the beaten track and commonly deserted, has at its south end cliffs of
How to read a sea level curve
Changes in sea level, or baselevel, are central to all forms of genetic stratigraphy. Shorelines migrate basinward or landward because