geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Dinoflagellate cysts and palynofacies; indicators of bathymetric variations in the Guercif Basin (Morocco) Jurassic (upper Bathonian-lower Oxfordian)


, : Dinoflagellate cysts and palynofacies; indicators of bathymetric variations in the Guercif Basin (Morocco) Jurassic (upper Bathonian-lower Oxfordian). Review of Palaeobotany and Palynology 77(1-2): 97-106

The basin of Guercif (northeast Morocco) is a large depression at the African margin of the Tethys, filled with Jurassic sediments and discordant Tertiary sediments. The boring MSD1 carried out on in the western subsident part of the basin, has reached the Upper Bajocian at 3600 m. Cores from between 2850 and 1650 m have been studied. The sediments, composed of alternating silty clays, sometimes calcareous, and fine sandstones, are dated at Upper Bathonian (Ctenidodinium sellwoodii-jy Ctenidodinium combazii assemblage) to Lower Oxfordian (Wanaea thysanota-Systematophora areolata assemblage). Lithofacies and palynofacies indicate sedimentation-types ranging from coastal to inner neritic shallow shelf. The continental influx has always been important. The maximum transgression is suggested by the abundance of disaccate pollen, chitinous foraminifers, dinoflagellate cysts with a wide specific diveristy, and by low percentages of vascular tissues. Non-marine phases are characterized by the abundance of land-plant tissues, spores of pteridophytes, Classopollis pollen and the absence of dinoflagellate cysts and foraminifers. Three transgressive phases took place in the basin of Guercif from the Upper Bathonian to the Lower Oxfordian. The major marine transgression occurred during the end of the Upper Callovian as suggested by indications of aridity.

US$19.90

DOI: 10.1016/0034-6667(93)90058-3


Other references

Ruiz Avila, I.; Gonzalez Moles, M.A.; Martinez, I.; Martinez D.V.ctoria, J.M.; Ramirez, C.; Garcia Hirshfeld, J.; Carazo, A., 1999: Undifferentiated carcinoma associated with adenoid cystic carcinoma of the tongue. Virchows Archiv 435(3): 259, Sept

Avakian, V.M.; Gillespie, J.S., 1967: The relationship between the development of fluorescence on and the response of arterial smooth muscle perfused with noradrenaline. Journal of Physiology 191(2): 71p-72p

Demchuk, A., 1983: Pelleted grass meal for finishing pigs. Young pigs were given daily 2.6 to 3.0 kg of a feed mixture of coarsely ground barley, peas and wheat, feed yeast, meat and bone meal and NaCl together with 225, 425, 730 or 1242 g of pelleted pasture lucerne. Respective average daily bodyweight g...

Nothof U.; Baessler U., 1990: The network producing the active reaction of stick insects is a functional element of different pattern generating systems. Elongation of the femoral chordotonal organ (signaling a flexion movement of the femur-tibia joint) in stick insects being active releases the active reaction (AR) in the extensor and flexor motor neurones. The AR was released in hindlegs in a sit...

Dvonch, V.; Dobozi, W., 1982: PROBLEM: Pelvic Fracture. Orthopedics 5(3): 354-366

Orduña, C., 1965: Necrosing colitis. (Contribution of a clinical case). Revista Espanola de Las Enfermedades del Aparato Digestivo 24(4): 498-501

Gallo, A.; Pagliuca, G.; de Vincentiis, M.; Martellucci, S.; Iallonardi, E.; Fanello, G.; Cereatti, F.; Fiocca, F., 2012: Endoscopic treatment of benign and malignant strictures of the cervical esophagus and hypopharynx. We evaluated the efficacy of endoscopic techniques employed in the management of cervical esophageal and hypopharyngeal strictures. A series of 45 patients with cervical esophageal (35) and/or hypopharyngeal strictures (10) were included. Twenty-f...

Borthwick, J., 2006: Heroes of health care face to face. Lancet 368(9529): 19-20

Yanagihara, S.; Izawa, E.; Koga, K.; Matsushima, T., 2001: Reward-related neuronal activities in basal ganglia of domestic chicks. We aimed to reveal what is coded in the basal ganglia of domestic chicks. In the water-reinforced 'go' task, chicks learned to peck selectively at a colored bead in order to obtain a drop of water. Out of 38 units obtained, seven showed...

Anouk, M.; Alouch, V.; Kimhi, D., 2004: The annual scientific meeting of the Israel Society of Rheumatology in Ashkelon, December 18-19th, 2003. Harefuah 143(4): 303-304