What happened to the organic matter from the Upper Cretaceous succession in Guatemala, Central America?

2021 ◽  
pp. 105246
Author(s):  
Wiesława Radmacher ◽  
Osmín J. Vásquez ◽  
Mario Tzalam ◽  
Mireya Jolomná ◽  
Anny Molineros ◽  
...  
Keyword(s):  
Organic Matter ◽  
Central America ◽  
Upper Cretaceous

Pythium heterothallicum. [Descriptions of Fungi and Bacteria].

2004 ◽  
Author(s):  
M. A. Spencer
Keyword(s):  
Triticum Aestivum ◽  
Organic Matter ◽  
Great Britain ◽  
Central America ◽  
Geographical Distribution ◽  
Lens Culinaris ◽  
Slovak Republic ◽  
Malus Pumila ◽  
Damping Off ◽  
Spinacea Oleracea

Abstract A description is provided for Pythium heterothallicum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASES: Seedling damping-off. HOSTS: Sambucus sp. (Caprifoliaceae); Spinacea oleracea (Chenopodiaceae); Lens culinaris (Fabaceae); Pelargonium cv. (Geraniaceae); Triticum aestivum (Poaceae); Malus domestica[Malus pumila] (Rosaceae). GEOGRAPHICAL DISTRIBUTION: AFRICA: Kenya. NORTH AMERICA: Canada, USA (Idaho, Washington). CENTRAL AMERICA: Costa Rica. AUSTRALASIA: New Zealand. EUROPE: Czech Republic, Germany, Great Britain, Netherlands, Slovak Republic, Spain, Sweden. TRANSMISSION: Contaminated soil, organic matter (oospores) and water (sporangia).

scholarly journals An early record of the genus <i>Cytheridella</i> Daday, 1905 (Ostracoda, Limnocytheridae, Timiriaseviinae) from the Upper Cretaceous of Mali, West Africa: palaeobiogeographical and palaeoecological considerations

1997 ◽  
Vol 16 (1) ◽  
pp. 91-95 ◽  
Author(s):  
Jean-Paul Colin ◽  
Yvette Tambareau ◽  
Valery A. Krasheninnikov
Keyword(s):  
West Africa ◽  
Central America ◽  
Brackish Water ◽  
Upper Cretaceous ◽  
African Origin ◽  
Caribbean Islands ◽  
Early Oligocene ◽  
Equatorial Africa ◽  
The Caribbean ◽  
First Time

Abstract. The limnic ostracod genus Cytheridella Daday, 1905 (Limnocytheridae, Timiriaseviinae), previously only known from Plio–Pleistocene sediments and Recent lacustrine environments of South and Central America, the Caribbean Islands, Florida and Equatorial Africa, and from earliest Eocene to Early Oligocene Eurasian localities, is found for the first time in the Upper Cretaceous (undifferentiated Campanian–Early Maastrichtian) of northern Mali, West Africa, suggesting an African origin for the genus. The association with the brackish-water ostracod genus Sarlatina suggests a mixo- or oligohaline environment for the Cretaceous species of Cytheridella.

PETROLEUM OCCURRENCE IN THE GIPPSLAND BASIN AND ITS RELATIONSHIP TO RANK AND ORGANIC MATTER TYPE

1984 ◽  
Vol 24 (1) ◽  
pp. 196 ◽  
Author(s):  
G. C. S Smith ◽  
A. C. Cook
Keyword(s):  
Organic Matter ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Late Eocene ◽  
Generative Capacity ◽  
Near Surface ◽  
Metamorphic History ◽  
Downhole Temperature ◽  
Gippsland Basin ◽  
Sediment Age

Coal rank, sediment age and downhole temperature data indicate that the rates of burial and palaeothermal gradients in the Gippsland Basin have varied both areally and with time over the Late Cretaceous to Recent period. The generation and occurrence of petroleum are controlled mainly by the burial metamorphic history. The inshore areas are gas prone because the Late Cainozoic burial meta-morphism is moderate and overprints an earlier phase of substantial burial metamorphism in the Late Cretaceous-Early Tertiary. The areas offshore in the Central Deep are oil prone because the earlier burial metamorphism was minor and the burial metamorphism during the last 20 Ma has been rapid and substantial.Vitrinite reflectance values (R̅vmax) vary from about 0.2 per cent at near-surface depths to over 1.2 per cent in the Upper Cretaceous sediments at depths of about 4 km and more. Exinite reflectance values (R̅emax) are about 0.05 per cent at near-surface depths increasing gradually to only 0.15 per cent at 3 km. Significant exinite metamorphism is evident at depths between 3 and 4 km, with major exinite metamorphism at 4-5 km and more at the base of the Upper Cretaceous sequence.The proportion of organic matter and its specific generative capacity increases up through the Latrobe Group. The Late Cretaceous to Early Eocene organic matter consists of orthohydrous vitrinite and diverse inertinite and is distinct from the Middle to Late Eocene coaly matter which consists of perhydrous vitrinite and minor amounts of inertinite. The Oligocene to Miocene organic matter is dominated by perhydrous vitrinites and is inertinite-poor. The overall proportion of exinite is roughly constant up through the Upper Cretaceous to Miocene terrestrial sequences although some forms of alginite are more common in the Eocene to Miocene sediments. Petrographic and geologic evidence suggests that much of the petroleum probably is generated from vitrinite in addition to exinite at low coal ranks (R̅vmax 0.4-0.8 per cent) and low burial depths (2-4 km).

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