Annamraju Rajanikanth

BIRBAL SAHNI INSTITUTE OF PALAEOBOTANY 53 UNIVERSITY ROAD LUCKNOW 226007 U.P. · DEPARTMENT OF SCIENCE & TECHNOLOGY GOV INDIA

Macrofloristic or microfloristic zonation of MesozoicMesozoic successions, with or without independent marine–biostratigraphic age constraints, is extensively utilized in sedimentary basin analyses worldwide. However, precise macrofloral or palynological demarcation of the non-marine MesozoicMesozoic successions remains elusive in India. This uncer...

Nomenclature reappraisal, diversity pattern and palaeoclimatic implications of Jurassic, Triassic and Early Cretaceous pycnoxylic woods in India are undertaken in the present study. Among the fourteen generic names published previously, only eight are validly published and the rest are nomenclaturally illegitimate. About 51 species were reported un...

Palynodating of Sawang Open Cast Mine (OCM) section from East Bokaro Coalfield, Damodar Basin has been done. Recovered palynofossils are characterized by the dominance of Striatopodocarpites–Faunipollenites complex. The other stratigraphically significant taxa recorded from this section are Guttulapollenites hannonicus, Crescentipollenites fuscus,...

The Early Cretaceous flora from the Gangapur Formation (Pranhita-Godavari Basin, east coast of India) was studied. Its plant diversity and abundance patterns were examined, and its palaeoecology and environment were interpreted, based on the micro-and macrofloras and sedimentological inputs. The flora is rich and diverse, and consists of bryophytes...

The Early Cretaceous flora from the Gangapur Formation (Pranhita-Godavari Basin, east coast of India) was studied. Its plant diversity and abundance patterns were examined, and palaeoecology and environmental were interpreted, based on the micro-and macrofloras and sedimentological inputs. The flora is rich and diverse, and consists of bryophytes,...

Earth’s terrestrial ecosystem during the early Cretaceous was marked by the dominance of naked seeded plants and appearance of flowering plants. Tectonic changes and evolutionary processes affected southern floras of the globe during this time. Review of Indian early Cretaceous flora distributed in peri and intra–cratonic basins signify homogenity...

Circoporoxylon kotaense, a new species of fossil wood, is systematically described from the Jurassic Kota Formation, in the Pranhita-Godavari Basin, India. A review of the distribution of global records revealed that the genus is widely distributed in both the northern and the southern hemispheres and favoured clarifications regarding its palaeobio...

Abundant plant fossils have been recovered from Early Cretaceous (Berriasian-Aptian) fluvial sediments of the Gangapur Formation, Pranhita-Godavari Basin, east coast of India. The flora consists of ferns and gymnosperms. The fern components in the collection include Cladophlebis, Coniopteris and Gleichenia. The gymnosperms are represented by Elatoc...

The Early Cretaceous sequences of the Krishna-Godavari Basin, East Coast hold significant plant relics which were an important component of hydrocarbon resource. Taxonomy, morphology, ecology and floral diversity have been discussed. The flora consists of Thinnfeldia, Pityospermum. Critical analysis of the flora shows dominance of Bennettito-Conife...

The present study deals with the plant megafossil assemblage and associated environment of the Vemavaram Formation (Krishna Depression), Krishna–Godavari Basin, Andhra Pradesh, India. The plant fossils are collected from Vemavaram (currently known as Ommevaram), Prakasam District, Andhra Pradesh. Sixteen taxa are recognised including four new speci...

Mesozoic East coast sedimentary basins distributed along the coasts of Tamil Nadu, Andhra Pradesh, Orissa and Bengal hold important fossil plants in the form of both macro-and micro relics. The Krishna Godavari Basin known for its rich hydrocarbon resources shows rich palaeofloral diversity preserved in different litho units. The Vemavaram Formatio...

Abstract Araucarioxylon Kraus is a widely known fossil-genus generally applied to woods similar to that of the extant Araucariaceae. However, since 1905, several researchers have pointed out that this name is an illegitimate junior nomenclatural synonym. At least four generic names are in current use for fossil wood of this type: Agathoxylon Hartig...

Reduviasporonites considered as a fossil algal/fungal remain, is usually recorded at the proximity of Permian-Triassic boundary. Till date it has been reported from China, Australia, Russia, Greenland, Austria and Saudi Arabia. Here we report a new species of Reduviasporonites (R. indicus)-a very significant evidence for mass extinction event at PT...

The Palynological result of sedimentary profiles from Anamalai Hills dated back to 1500 years B.P., had been documented through retrieved pollen/spores from sediments and modern surface samples (moss cushions). The investigated sites cover Karian shola, Arumparai, Kalikamthi and Schichalli regions of Anamalai Hills, South India. Lithology of the pr...

The Palar Basin is one of the 17 river basins that exist in India. The basin embodies an Archean metamorphic complex overlain by the Gondwana sediments represented by the Lower Gondwana sequence (Fluvio-glacial deposits of Early Permian) with a northeast-southwest trend. The Sriperumbudur Formation, named after Sriperumbudur town in South India, ne...

The Palar Basin is one of the 17 river basins that exist in India. The basin embodies an Archean metamorphic complex overlain by the Gondwana sediments represented by the Lower Gondwana sequence (Flnvio-glacial deposits of Early Permian) with a northeast-southwest trend. The Sriperumbudur Fonnation. named after Sriperumbudur town in South India, ne...

PALYNOLOGY OF GONDWANA SEDIMENTS OF UMRER COALFIELD, WARDHA VALLEY , INDIA

The present paper records 8 species of non-geniculate coralline algae from the Early Cretaceous of the Uttatur Group, Tiruchirapalli District, Tamil Nadu, south India. Of these, six species are distributed among three genera of the corallinaceae family: three species belong to Amphiroa. one species is assigned to Lithothamnion and two species are p...

PALYNOLOGY OF KALLAMEDU FORMATION CAUVERY BASIN, INDIA ANALYSED

The terrestrial biogeography of Gondwana during Jurassic–Early Cretaceous times is poorly resolved, and the flora is usually considered to have been rather uniform. This is surprising given the size of Gondwana, which extended from the equator to the South Pole. Documenting Gondwanan terrestrial floristic provincialism in the Jurassic–Early Cretace...

A rich megaspore assemblage has been recorded from the Early Permian Barakar Formation of Umrer Coalfield, Wardha Basin. The assemblage is represented by nine genera and thirteen species. Bokarospori/es rOlUndus, Banksispori/es indicus, B. utkalensis, Duospori/es congoensis, D. irregularis, Duospori/es sp., Barakarella pan/ii, Talchirella /rivedii,...

The present wood collected from a small mound about 2 km west of Sattanur Village. The lithology of area conforms with the Kulakkalnattam Sandstone Member characterised by fine to coarse calcareous sandstones with two distinct layers of carbonate concretions, shell rich sandstones, silty sandstones, ferruginous sands, argillaceous siltstones and pe...

A new species of Podocarpean wood described from south rewa gondwana basin of india.

A synthesis of fossil gymnospermous woods from various Gondwana basins of India is presented, and characters of growth rings in the secondary wood, panicularly tracheidal cell characters, are evaluated for possible palaeoclimatic signals. Permian fossil woods are mostly recorded from the Damuda, Wardha and Pranhita-Godavari basins. Growth rings are...

Fig. I-Check list of plant fossils from Pisdura and their stratigraphic range. In addition. Gangamopleris sp., Glossopleris sp. and Noeggeralhiopsis sp. are also present in the assemblage. (Lakhanpal et aI., 1976; Chandra & Tewari, 1991; Agashe & Prasad, 1989; Agashe & Shash i Kumar, 1996). Present communication brings out the necessity to investig...

New locality of plant fossil occurrence highlighted. Members of Glossopteris Flora recorded. New additional knowledge on Glossopteris flora of india.

Geological age of Ptilophyllum flora is discussed.

Palynological investigations on the Cretaceous-Tertiary transition in the bore-hole no. CM 5 drilled in the Atlantic Ocean, off Senegal Coast, West Africa have been carried out. According to the stratigraphic data the top of the Maestrichtian is marked approximately at 952 m. The present study is aimed to detail out palynological data and correlate...

NEW PALYNOLOGICAL DATA FROM PADWAR

A NEW CONCEPT OF GONDWANA

Fossil bemhonic photosymhetic algae capable of calcification comributed to the formation of Indian Cretaceous·Tertiary carbonate depOSits. A comparative assessmem of different marine calcareous algal assemblages known from various sedimemary basins and their ecological requiremems have been highlighted. Acomprehensive symhesis and retrospect of res...

PALYNOLOGICAL DATA FROM NARCONDAM ISLAND