ML |
Microbial Laminite |
Laminated or thinly bedded |
Mudstone and microbial mat intercalation |
organomineralization, trapping and binding |
MLb |
Microbial Laminite with boudin-like structure |
Laminated or thinly bedded with sedimentary boudinage |
Mudstone and microbial mat intercalation with boudin-like structure some layers |
organomineralization, trapping binding, desiccation, and differential compaction of patchy deposits |
MML |
Mudstone interlayered with Microbial laminite |
Laminated with little lateral continuity |
Thick and discontinuos laminated microbial mat in mudstone |
organomineralization, trapping and binding |
MUD |
Mudstone |
_ |
Massive gray mudstone |
organomineralization and carbonate mud precipitation |
TB |
Thrombolite |
Clotted texture |
Microbialite with clotted texture |
organomineralization, trapping and binding |
MUDdc |
Mudstone with desiccation crack |
Shrinkage crack |
Mudstone with shrinkage cracks that is filled with carbonate sand or microbial mat |
organomineralization, carbonate mud precipitation and desiccation |
MUDsc |
Mudstone with syneresis crack |
Syneresis crack |
Mudstone with incomplete polygonal pattern and with either bird’s foot or spindle shape |
Salinity changes and osmotic effects |
HClb |
Heterolithic carbonate with lenticular bedding |
Lenticular bedding |
Light gray mudstone with dark fine gray carbonate sand lenses |
Fluctuations in sediment supply or intensity of current activity |
HCcl |
Heterolithic carbonate with cross-lamination |
Low-angle cross-lamination |
Heterolytic mudstone and dolomite preserving the cross-laminations |
subaqueous currents in lower flow regime in waning flood deposits |
PCK |
Massive packstone |
_ |
Dark gray carbonate composed of fine-grained sand |
Pseudoplastic debris flow |
PCKcl |
Packstone with cross-lamination |
Low angle Cross-lamination |
Dark gray carbonate sand with interleaving between very fine and fine grains |
subaqueous currents in lower flow regime |
PCKhl |
Packstone with horizontal lamination |
Horizontal lamination |
Dark gray carbonate with interleaving between fine- and medium-grained sand layers |
subaqueous currents in lower flow regime |
PCKcr |
Packstone with current ripple |
Linguoid current ripple |
Dark gray carbonate sand composed of very fine and fine grains |
subaqueous currents in lower flow regime |
PCKscs |
Packstone with swaley cross-stratification |
Swaley cross-stratification |
Dark gray carbonate sand composed of very fine and fine grains |
Result of storm waves |
FLT |
Floatstone |
Massive and lenticular geometry |
Matrix supported, massive carbonate gravel. The matrix is composed of fine gravel and the coarse fraction is composed by rounded granules and pebbles. Although some may be angular |
Pseudoplastic debris flow (low strenght, viscous) |
RUD |
Rudstone |
Massive and lenticular geometry |
Clast-supported carbonate gravel. The matrix is composed of fine gravel and the coarse fraction is composed mainly by rounded granules and pebbles. |
Pseudoplastic debris flow (inertial bedload, turbulent flow) |