Terrigenous muds

Aller R.C. (1982) Carbonate dissolution in nearshore terrigenous muds the role of physical and biological reworking. J. Geol. 90, 79-95. 

B. Terrigenous muds, CaCOa 30 %. Quarz, feldspar, mica dominant Prefixes quartzose, arkosic, micaceous... 

Basically, it can be stated that the sedimentation rate decreases with increasing distance from a sediment source, may this either be a continent or an area of high biogenic productivity. The highest rates of terrigenous mud formation are recorded on the shelf off river mouth s and on the continental slope, where sedimentation rates can amount up to several meters per one thousand years. Distinctly lower values are observed at detritus-starved continental margins, for example of Antarctica. The lowest sedimentation rates ever recorded lie between 1 and 3 mm ky. and are connected to deep-sea red clay in the offshore deep-sea basins (Table 1.7), especially in the central Pacific Ocean. 

Crevello, P. D., J. M. Rine D. E. Lanesky, 1981. A method for impregnating unconsolidated cores and slabs of calcareous and terrigenous muds. J. Sed. Petrol. 51 658-660. 

B. Terrigenous mud. CaCO <30%. Quartz, feldspar, mica dominant... 

In the southeast, the delta of the Kuban River with vast flooded plains and numerous channels extends over about 100 km. The Kuban River enters the top part of the open Temryuk Bay. Low seacoasts gradually descend to a flat sandy bottom. The depths smoothly increase with the distance from the coast. The largest depths are observed in the central part of the sea in Taganrog Bay, they range from 2 to 9 m. In Temryuk Bay, mud volcanoes are known. The main sources for the supply of the terrigenous matter that forms the bottom sediments of the Sea of Azov are represented by the products of coastal abrasion and the riverine alluvium. The bottom sediments are mostly represented by clayey and silty oozes and sands. 

Phosphorites occur in organic-rich muds deposited on the shelf off southwest Africa, which are also enriched in certain minor metals that are not of terrigenous origin (30 p. 209-210). The metals in these sediments are within the ranges of the metal content of... 

A fraction of the eroded mass made of small-size particles is transported by winds over subglobal distances, to be ultimately deposited in the open ocean and on other continents. Rates of sediment accumulation in the open oceans are much lower than for sediments in continental bodies of water, where in lakes the rates are typically of an order of 10° 1 mm yr"1 for terrigenous sediments and are higher for deposition of organic-matter-rich muds in areas of strong primary productivity. 

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