WorldCat Identities

Ashraf, Abdul Rahman

Works: 10 works in 15 publications in 3 languages and 70 library holdings
Genres: Juvenile works  Dictionaries 
Roles: Author
Classifications: QE993, 561.130943
Publication Timeline
Most widely held works by Abdul Rahman Ashraf
Schichtenfolge, Sedimentanalyse und Palynoflora im Miozän des Tontagebaus Fischer, Adendorf (BL. 5308-Bad Godesberg) by Heinz Wilhelm Wittke( Book )

6 editions published in 1987 in German and held by 52 WorldCat member libraries worldwide

Die räto-jurassischen Floren des Iran und Afghanistans : 3, die Mikrofloren der rätischen bis unterkretazischen Ablagerungen Nordafghanistans by Abdul Rahman Ashraf( Book )

1 edition published in 1977 in German and held by 6 WorldCat member libraries worldwide

Palynologie und Palynostratigraphie des Neogens der Niederrheinischen Bucht by Abdul Rahman Ashraf( Book )

1 edition published in 1996 in German and held by 2 WorldCat member libraries worldwide

Palaeoclimate reconstructions of the Oligocene to Pliocene from eight sites in northwest Germany using the Coexistence Approach, supplementary data to: Utescher, Torsten; Mosbrugger, Volker; Ashraf, Abdul Rahman (2000): Terrestrial climate evolution in northwest Germany over the last 25 million years. Palaios, 15(5), 430-449 by Torsten Utescher( )

in English and held by 1 WorldCat member library worldwide

The first detailed reconstruction of the continental palaeoclimate evolution of the Northwest German Tertiary (Late Oligocene to Pliocene) is presented. The paleoclimate data are derived from the paleobotanical record using the coexistence approach, a method recently introduced that employs climatic requirements of the Nearest Living Relatives of a fossil flora. Twenty six megafloras (fruits and seeds, leaves, woods) from the Tertiary succession of the Lower Rhine Basin and neighboring areas are analyzed with respect to ten meteorological parameters. Additionally, two sample sets from Late Miocene to Early Pliocene sediments comprising 396 palynofloras are analyzed by the same method providing a higher temporal resolution. The temperature curves show a comparatively cooler phase in the Late Oligocene, a warm interval the Middle Miocene, and a cooling starting at 14 Ma. The cooling trend persisted until Late Pliocene with a few higher frequency temperature variations observed. From the beginning of Late Miocene to the present, the seasonality increases and climate appears to have been less stable. As indicated by the precipitation data, a Cfa climate with wet summers persisted in NW Germany from Late Oligocene to Late Pliocene. The results obtained are well in accordance with regional and global isotope curves derived from the marine record, and allow for a refined correlation of the Tertiary succession in the Lower Rhine Basin with the international standard. It is shown that the reconstructed data are largely consistent with the continental climate record for the Northern Hemisphere, as reported by various authors. Discrepancies with previous reconstructions are discussed in detail
Kamus awal KBSR : (bahasa Malaysia-bahasa Inggeris)( Book )

1 edition published in 1986 in Malay and held by 1 WorldCat member library worldwide

Die räto-jurassischen Floren des Iran und Afghanistans( Book )

in German and held by 1 WorldCat member library worldwide

Miocene microflora and palaeoclimate reconstructions from three sites in Bulgaria, supplementary data to: Ivanov, Dimiter A; Ashraf, Abdul Rahman; Mosbrugger, Volker; Palamarev, E (2002): Palynological evidence for Miocene climate change in the Forecarpathien Basin (Central Paratethys, NW Bulgaria). Palaeogeography, Palaeoclimatology, Palaeoecology, 178(1-2), 19-37 by Dimiter A Ivanov( )

in English and held by 1 WorldCat member library worldwide

In this study we reconstruct quantitatively the Middle to Upper Miocene climate evolution in the southern Forecarpathian Basin (Central Paratethys area, Northwest Bulgaria) by applying the coexistence approach to 101 well-dated palynofloras isolated from three cores. The climatic evolution is compared with changes in vegetation and palaeogeography. The Middle Miocene was a period of a subtropical/warm-temperate humid climate with mean annual temperature (MAT) between 16 and 18?C and mean annual precipitation (MAP) between 1100 and 1300 mm. Thereby, during the entire Middle Miocene a trend of slightly decreasing temperatures is observed and only small climate fluctuations occur which are presumably related to palaeogeographic reorganisations. The vegetation shows a corresponding trend with a decrease in abundance of palaeotropic and thermophilous elements. The Upper Miocene is characterised by more diverse climatic conditions, probably depending on palaeogeographic and global climatic transformations. The beginning of this period is marked by a slight cooling and a significant drying of the climate, with MAT 13.3-17?C and MAP 652-759 mm. After that, fluctuations of all palaeoclimate parameters occur displaying cycles of humid/dryer and warmer/cooler conditions, which are again well reflected in the vegetation. Our study provides a first quantitative model of the Middle-Upper Miocene palaeoclimate evolution in Southeastern Europe and is characterised by a relatively high precision and resolution with respect to the climate data and stratigraphy
Die räto-jurassischen Floren des Iran und Afghanistans : 6. Jurassische und unterkretazische Dinoflagellaten und Acritarchen aus Nordafghanistan by Abdul Rahman Ashraf( Book )

1 edition published in 1979 in German and held by 1 WorldCat member library worldwide

Pteridophyte spores of Rio Grande do Sul flora, Brasil : part IV by Maria Luisa Lorscheitter( Book )

1 edition published in 2002 in English and held by 1 WorldCat member library worldwide

Sporen-Assoziationen aus dem Oberems der mittleren Eifel <Rheinisches Schiefergebirge> by Abdul Rahman Ashraf( Book )

1 edition published in 1991 in German and held by 1 WorldCat member library worldwide

Audience Level
Audience Level
  Kids General Special  
Audience level: 0.85 (from 0.73 for Kamus awal ... to 0.98 for Die räto- ...)

Alternative Names
Abdul Rahman Ashraf deutscher Geologe

Ashraf, A. R.

Ashraf, A. R. 1944-

Ashraf, A. R. (Abdul Rahman)

Rahman Ashraf, Abdul 1944-

German (11)

English (3)

Malay (1)