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High Atlas middle liassic carbonate platform of Morocco and succession of regressive, autocyclic, "shallowing upward" metric sequences. "shallowing upward" sequences from two sections distant of 230 km; note the hurricane (tempestites and tsunami ?)levels with abundant displaced foraminifera on supratidal flat. Middle Liassic, Morocco.
[2] [1] Most parasequences show a shallowing upward, [3] which is sometimes also included into the definition. [4] Schematic graphic log showing facies successions in common types of clastic parasequences Schematic graphic log showing facies successions in common types of carbonate parasequences
Virtual metric "shallowing upward sequence" observed all along (more than 10,000 km) the south Tethyan margin during middle Liassic times. The (micro)fossils are identical till Oman and beyond. Sequence stratigraphy of carbonate platforms
A more tectonically quiet posterior phase provided the Tremp Basin with a shallowing-upward sequence of marine carbonates until the moment of deposition of the Tremp Formation, in the lower section still marginally marine, but becoming more continental and lagoonal towards the top.
They show a total of three sequences of shallowing-upward features, one shoaling upward sequence in the Zonda formation and two in the La Flecha Formation. It is described as aggradational carbonate complex because of insignificant lateral sift of deposits.
The Walcott–Rust quarry is excavated into beds of the lower part of the Rust Formation and consist of a distinctive one meter package of generally tabular, fine grained lime mudstone with a few bioturbated beds, part of a series of shallowing upward cycles that commence with dark shales that grade into fine-grained limestones. [10]
Hardie and his students and colleagues also studied cyclic sedimentation, confirming that platform carbonates of the Middle Triassic (Anisian-Ladinian) of the Latemar buildup consist of a vertical stack of over 500 thin (ave. thickness 0.6-0.85m) shallowing-upward depositional cycles that record high frequency eustatic sea level oscillations in ...
In sedimentary geology and geomorphology, the term progradation refers to the growth of a river delta farther out into the sea over time. This occurs when the volume of incoming sediment is greater than the volume of the delta that is lost through subsidence, sea-level rise, or erosion.