Characteristics of Marginal Marine Environments: A Study of Coastal Formations, Quizzes of Geology

Download Characteristics of Marginal Marine Environments: A Study of Coastal Formations and more Quizzes Geology in PDF only on Docsity! TERM 1 Characteristics of Marginal Marine (Transitional) Settings DEFINITION 1 Transition from land to sea, thus marks shoreline Waves & Tides rework sediment and concentrate sands Transition from land to sea means transition from continental to shallow marine fossils Dominantly detrital sediment (sands, shales) Ribbons of sands, bidirectional cross bedding in barrier islands Delta complexes where rivers meet the sea TERM 2 Barrier Islands & Beaches DEFINITION 2 Well sorted sandstones with pieces of marine fossils and bidirectional cross bedding formed by the movement of tides and waves TERM 3 Coastal Dunes DEFINITION 3 Large scale cross-bedding in sands with ribbon geometry and broken marine fossils. May also be rooting Well sorted, fine grained sands TERM 4 Coastal Marshes & Lagoons DEFINITION 4 Burrowed organic-rich shales and coals with marine or brackish water fossils. Geometry parallels shoreline (ribbon geometry like other coastal deposits) TERM 5 Deltas DEFINITION 5 deposition where rivers meat the sea inner delta plains have rivers and freshwater swamps outer delta plains have river passing by saline swamps (influence of the sea is felt) delta front- river dumps sand it carries, sands have a marine overprint including marine fossils Reworked into small barrier island complex