. Bulletin of the Natural Histort Museum. Geology series. STRATIGRAPHY AND TRILOBITE FAUNAS FROM THE CAMBRIAN BURJ FORMATION 135 20oJn\1 210 o, ?»" ->>a>* SCALE V / Us,V_Bfe£?' DEAD SEA V_^ i':Uf?^AS>r - POTASH WORKS/ /%1^-wv f^V ^\ •»* J^ oso G* SAFITOWN ^^U * Wadi Saram^Z.—J&C Jj Khirbet El Burj SN^, __S^Vf>'?r>M-, ^5-^ Fig. 3 Generalised map of the Safi area, southern Dead Sea, showing the outcrop of the Burj Formation (stippled), and the localities mentioned in the text. The grid is Palestine National Grid (PNG); geological boundaries after Powell (1988). with la
. Bulletin of the Natural Histort Museum. Geology series. STRATIGRAPHY AND TRILOBITE FAUNAS FROM THE CAMBRIAN BURJ FORMATION 135 20oJn\1 210 o, ?»" ->>a>* SCALE V / Us,V_Bfe£?' DEAD SEA V_^ i':Uf?^AS>r - POTASH WORKS/ /%1^-wv f^V ^\ •»* J^ oso G* SAFITOWN ^^U * Wadi Saram^Z.—J&C Jj Khirbet El Burj SN^, __S^Vf>'?r>M-, ^5-^ Fig. 3 Generalised map of the Safi area, southern Dead Sea, showing the outcrop of the Burj Formation (stippled), and the localities mentioned in the text. The grid is Palestine National Grid (PNG); geological boundaries after Powell (1988). with laterally accreted channel-fill, probably of meandering-river or tidal-flat origin. Wave ripples, small-scale bidirectional cross-bed- ding, intra-clasts, burrows and thin dolomite laminae in the Tayan Siltstone suggest a marine incursion over a low-lying alluvial plain, and deposition in a shallow subtidal to intertidal environment. The succeeding carbonates (Numayri Dolomite) mark the maximum phase of the transgression. Oncolites, oolites, disarticulated brachiopod shell lenses, low-angle cross-bedding with shallow scours in the purer carbonates, and ripple cross-lamination in the siliciclastic- rich carbonates indicate deposition in a warm, shallow, carbonate lagoon, with periodic storm-events redistributing ooliths, bioclasts and quartz sand. Domal, laterally linked stromatolites indicate intertidal to supratidal conditions near the top of the unit. The Hanneh Siltstone represents the regressive phase marked by an influx of siliciclastic sediment, derived from the south, into the shallow carbonate platform. Sedimentary structures and trace fossils similar to these in the Tayan Member suggest deposition in a tidally dominated shoreline. Subsequently, coarse-grained, trough cross- bedded sand was deposited, by braided to meandering rivers, which prograded over the wedge of marine sediments. In central and south Jordan, continental fluvial deposition continued through the
Size: 2068px × 1208px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bhlconsortium, bookc, bookcentury1900, bookcollectionbiodiversity
