Palaeobiology of the Sonia Sandstone Formation of the Jodhpur Group reveal occurrence of sedimentary structures unique to Ediacaran Period. Closely comparable forms to Ediacaran mollusk also confirm such possibility.

Recovery of Organic-walled microfossils (OWM), acritarchs, and cyanobacteria in the limestone of Chhuipali Formation, Singhora Group (Chhattisgarh) and cyanobacteria in Charmuria Limestone of Raipur Group constitutes new knowledge to early life records.

Investigations on plant fossils of Bijori Formation, Satpura Gondwana Basin suggest existence of transitory flora of Late Permian and Early Triassic.

Coiled and irregular shaped trace fossils from the sandtone facies of Barakar Formation of Mohpani and Pench valley coalfields suggest ichno-fossil affinity. Floristics of Bansa Formation, South Rewa Gondwana basin indicates existence of flora akin to Neocomian-Albian flora of Europe, Moscow Basin, Western Siberia, and North America.

Seven palyno-assemblage zones ranging from in Early Permian to Late Permian were established from coalbearing horizon bore-holes in Rajmahal Basin.

An earliest Early Cretaceous palyno-assemblage within the Intertrappean sediments (181.40- 215.00 m) was recognized for the first time in the Raniganj Coalfield.

Xylotomocal investigations on Tertiary woods of Bikaner and Jaisalmer suggest prevalence of angiosperms belonging to Lythraceae (Lagerstroemia), Ebenaceae (Diospyros), and Myrtaceae (Eucalyptus). Recovery of Eucalyptus from Eocene of Rajasthan confirms its wide spread occurrence in India in early Tertiary.

Investigations on the fossil woods of Intertrappeans (Bhutera, Chhindwara, Madhya Pradesh) reveal abundance of dicotyledons.

Rich assemblage of legume fruits from the Oligocene sequence of Makum and Dilli-Jeypore coalfields indicates a warm and humid climate in the region during the deposition of the sediments

Leaf remains of Dafla Formation, West Kameng District, Arunachal Pradesh (Middle-Upper Miocene) were studied in conjunction with the distribution of modern counterparts which denote tropical vegetation components.

Two new fossil woods resembling extant taxa, Hopea sulcata Sym. and Duabunga grandiflora (Roxb.ex DC.) Walp. (Dipterocarpaceae and Lythraceae) show extinction trends during Miocene in the Himachal Pradesh.

CLAMP (Climate Leaf Analysis Multivariate Program) calibration using Global Gridded Meteorological Data and PHYSG3BR physiognomic data calibrated with the climate station based MET3BR opened new way to include natural vegetation anywhere in the world irrespective of the proximity of a meteorological station.

Freshwater influence in the marine depository basin, Pynursla Plateau, Khasi Hills is marked by the presence of aquatic freshwater ferns and indicative of a marginal deposition.

Palynofacies and palynology on various lithotypes (coal, carbonaceous shale, siliciclastic clay) distributed in Bapung Coalfield, Mikir Hills and Upper Assam Basin reflect impact of rapid climatic warming as evidenced by pan-tropical mega-thermal angiosperms.

Multiproxy data (dinocysts, palynofacies, clay mineralogy, carbon isotope) was used to interpret climatic scenario across PETM interval in Jathang section and sudden increase in the diversity pattern of terrestrial palynomorphs was observed.

Middle Albian nanno-fossil assemblage from the Pariwar Formation, Rajasthan Basin constitutes first chronologic inference.

FTIR studies on resins of Ratnagiri and Neyveli lignites establish their genesis to polycadinene structures and diagnostic biomarker of the dammar resins suggest terrestrial input in the form of angiosperms.

Non-pollen microfossils recovered from the sedimentary sequence of the Kargil and Tharumsa formations (Late Oligocene-Miocene), Ladakh Molasse Group was suggestive of humid moist conditions.

Discovery of dinoflagellate cysts in the split lignite seam inter burden Neyveli lignites associated with marine sedimentary structures indicate Middle Eocene age and coastal to marginal marine environment of deposition.

Three cenozones have been recognized on the basis of first appearance, acme and decline of palynotaxa in the deposits studied from the Vastan Lignite,Cambay Basin, Gujarat which reflect changing palaeo-depositional environments.

The petrological evidences substantiate predominance of huminite and features of macerals/fossils and their correlation to modern plant equivalents in the Neyveli (Miocene), Cauvery Basin and Panandhro (Eocene), Kutch Basin support contribution of mangrove-mixed angiospermic vegetation to the lignite formation.

Two transgressive /regressive cycles have been recognised at level 278 cm and 40 cm in sediment profile CHI- 31., Chilka Lake, Orissa dated back to 1575 ±35 yrs. B.P.

Organic matter studies on soil-core of Andhra Pradesh indicate fresh water fluvial energy and abundance of allochthonous woody charcoal debris, blackish cuticular fractions and identifiable plant tissues and chytridiales.

Gonyaulacoid and Peridinoid investigations of dinoflagellate cyst and palynofacies studies from the upper 1m profile of the GC – 1 core (Karawar Coast) revealed significant variation in their vertical distribution.

Occurrence of tree-savannahs comprising grasses with scanty trees was established through pollen analytical investigations from Nitaya Lake, Hoshangabad district (6650 to 5780 yrs B.P). Forest history of open mixed deciduous forests has been traced. (Between 5780 and 3000 yrs B.P).

Pollen analysis of moss cushion and forest humus procured from Dirpai and Singrijan forest, Assam depicts the existence of vast low land forest with marshy swamp.

Phytolith studies on Sambhar lake sediments and high resolution paleo-monsoonal history indicate brief dry phase before Early Holocene (~10,000 yrs BP) followed by high precipitation during 9490 yrs BP.

Changing relative frequencies of major arboreal and non arboreal pollen taxa, in the Kusumelli Swamp corresponds to climate fluctuations. Vegetational diversity during 11,900 yr BP to 8490 yr BP under warm and humid climate was suggested.

Based on palynofacies, magnetic, textural and loss on ignition parameters a model was proposed using Holocene profiles from Mujhpur and Dabka localities Baroda Window, Mainland Gujarat.

OSL chronology suggests that lake deposits in the Spiti valley were formed in two episodes influenced by tectonic movement along the Kaurik-Chango fault  An elemental analyzer (HCNS- O) has been set up along with necessary accessories to measure relationship of carbon to nitrogen ratios in vegetations

Rich assemblage of spores, pollen, dinoflagellates, diatoms, thecate amoebae, micro-foraminifers, scolecodont fragments, radiolarians, copepod egg-shells, tintinnids, etc. was recovered from the sediments collected during 1st Indian Expedition to the Arctic (2007). Diverse ecological niches such as freshwater, oligosaline, mesosaline, oligohaline, mesohaline, eurysaline and dry ecosystems have been ascertained.

Studies on cyanobacterial mats from lakes near the Russian base, NOVO Arctic helped to understand the present day lake ecology and the role of cyanobacteria in defining the organic matter distribution pattern.

Studies on Glossopteris floral elements from Weller Formation (Permian) and the Lashly Formation (Triassic) Allan Hills, Southern Victoria Land, Central Transantarctic Mountains, establishes their close similarity to Barakar
and Raniganj flora of India.

Palynology of Guling Formation, Guling Area, Pin Valley reveals presence of zonate/apiculate triletes, leiosphaerids and achritarchs along with characteristic pollen-spores.

Cross-dating of 20 tree core samples of Himalayan pencil juniper (Juniperus polycarpos) and 35 tree core samples of Himalayan cedar (Cedrus deodara) collected from different sites in Lahaul, Himachal Pradesh helped to develop the ring-width chronologies of respective species. The chronology of Himalayan pencil juniper extends back to the early 10th century AD and Himalayan cedar to 15th century.

Temporal variation of radiocarbon (C14) in annual rings of Teak tree (Tectona grandis) from two sites– Hoshangabad (22° 302 N:78°E) Madhya Pradesh, and from Thane (19° 122 N:73°E) Maharashtra were studied. Peak values have been used to estimate the local emission of fossil fuel CO2, which is approximately
2.3% of the background atmospheric CO2 concentration.

The record of neem (Azadirachta indica) seed/fruit remains, medicinally valuable tree taxa from Sunga-Kushana levels (200 B.C.-300 A.D.) is significant in archaeological lexicon of Ganga Plain.