| Stage | Facies ID | DESCRIPTION | INTEPRETATION |
| -1 | QC-fn-1-pf | Radarfacies underlying the upper Pleistocene sediments, displays regular reflections which are truncated (toplap-offlap) in its upper boundary | Pre-fault radarfacies undergone hanging-wall collapse and erosion |
| 1 | QC-fn+1-ps | Pleistocene sediments (poorly compacted) cropping out west of Quinta escarpment (Barrier III). | Pleistocene sediments cropping out at the footwall top west of fault escarpment (Barrier III). It also undergone hanging-wall collapse and erosion |
|
| QC-sn+2-et | Offlap-toplap for reflectors of the underlying lower Pleistocene sediments | An erosional surface developed on the top of footwall block and on down-throwing hangingwall |
|
| QC-sn+1-lf | Upward concave listric geometry surface that truncate Pleistocene sediments (west) and beach ridges radarfacies (east) | Listric normal fault. See also associated branching normal faults. |
| 2 | QC-fn+2-br | Eastward gently dipping reflectors, some upper western arched crests, displaying onlap against normal faults and its subunits, and downlap on Pleistocene basement | Beach ridges stacks with different crest preservation degree |
|
| QC-sn+3-tl | Surface at the top of the beach ridges radarfacies, showing toplap for underlying reflectors | Irregular surface that is the unconformity overlying beach ridges radarfacies |
| 3 | QC-fn+3-af | Horizontal and irregular reflectors in the hanging-wall close to listric surface | Alluvial fans: local sedimentary accumulation of sand due to drainage erosion from the structural high (fault footwall) |
|
| QC-sn+4-dl | Discrete onlap-downlap features upon previous radarfacies on Quinta escarpment, or horizontal irregular reflectors far from escarpment | Surface defining the unconformity between overlying TD and TDS and the underlying beach ridges radarfacies |
| 4 | QC-fn+4-tds | Horizontal and steeply dipping sigmoidal reflections, as also as thin horizontal reflection near the topographic surface | Transgressive dunes (TD) and thin dune sheets (TDS) overlying previous sedimentary radarfacies: 6a—steeply dipping reflections: lateral limbs of recent dunes; 6b—horizontal reflections: frontal dune strata, and thin wind covers |
|
| QC-sn+5-tl | Surface at the top of the beach ridges radarfacies, showing toplap for underlying reflectors | Unconformable irregular surface that limits the underlying beach ridges radarfacies |
| 5 | QC-fn+5-lag | Horizontal well defined reflectors far from fault escarpment, showing discrete toplap for underlying radarfacies | Lagoonal sediments close to Lagoa dos Patos, showing some interfingering with aeolian TDS sediments |
|
| QC-sn+n-df | Minor truncation of inner reflections of radarfacies | Minor listric normal faults merging into master one, or diachronic synthetic and antithetic normal faults |
| Types of radarfacies (f) | Types of boundary surfaces (s) | ||
| ps = Pleistocene sediments | lf = listric normal fault | ||
| pf = pre-fault units underlying the Pleistocene | et = erosional truncation | ||
| br = beach ridges | ol = onlap | ||
| af = alluvial fans | dl = downlap | ||
| lag = lagoonal sediments | tl = toplap | ||
| tds = transgressive dunes and dune sheets | df = diachronic normal faults | ||