Characteristic features of erosion surfaces in both the proximal and the distal muddy settings.
|Characters||Proximal muddy settings||Distal muddy settings|
|Boundary nature||Irregular, scoured, cutting down, gradational to irregular||Sharp to irregular |
|Lithofacies||Calcareous-rich mudstone facies with dolomitic cementation||Clay-rich mudstone facies with pyritic cementation|
|Reworked concretions||Rounded to subrounded calcareous shale intraclasts ||Rounded to subrounded phosphatic pellets|
|Shelly laminae||Reworked shell fragments||Compacted shelly laminae|
|Shale ripup clasts||Rarely occurred||Elongated, flaky with sharp edges|
|Energy levels||High energy enough to include reworked shale intraclasts and other components||Low energy where the shale rip-up clasts are suspended in the sea bed layer|