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GeoRef Categories
Era and Period
Epoch and Age
Date
Availability
Damodar Valley
Geomechanical Characterization of the Barren Measure Formation in the Raniganj Sub-basin of Damodar Basin, India Available to Purchase
Influence of Mineralogy, Organic Matter and Thermal Maturity on the Diagenetic Evolution of Pore Systems in the Shales of Cambay and Raniganj Basin, India Available to Purchase
Floral Diversity of South Karanpura Basin, Jharkhand, India and their Palaeoclimatic Implication with Special Reference to Palaeoenvironment Available to Purchase
A test of Bergmann's rule in the Early Triassic: latitude, body size, and sampling in Lystrosaurus Open Access
Evolution of Opencast Mines in the Raniganj Coalfield (India): An Assessment through Multi-temporal Satellite Data Available to Purchase
Estimation of Dry-Season Fluctuation in Specific Yield using Water Budgeting Approach in Bonasuria Micro-watershed of Damodar River Basin, India Available to Purchase
Geophysical Exploration of Unconventional Hydrocarbons Available to Purchase
Missing Coal Seam between East and West Bokaro near Lugu Hill of Damodar Basin, India: A Geological Model Available to Purchase
Nature of Cretaceous dolerite dikes with two distinct trends in the Damodar Valley, eastern India: Constraints on their linkage to mantle plumes and large igneous provinces from 40 Ar/ 39 Ar geochronology and geochemistry Open Access
A Field-scale Overview of Facies Architectures and Depositional Environment Integrating Core and Geophysical Log Data: Study from a Marginal Gondwana Basin, India Available to Purchase
Predictions of Gross Calorific Value of Indian Coals from their Moisture and Ash Content Available to Purchase
Geophysical Log-based Coal Characterization of Middle Permian Barakar Formation from North Karanpura Coal Field, India Available to Purchase
Testing of Coupled SCS Curve Number Model for Estimating Runoff and Sediment Yield for Eleven Watersheds Available to Purchase
Organic Matter Characterization of Carbonaceous Shales from Raniganj Coalfields and its Implications on Depositional Condition: A Palynofacies and Petrographic Overview Available to Purchase
Thermally Altered Coals from Bore Core EBM-1, East Bokaro Coal Field, Damodar Valley, India: A Petrographic Inference Available to Purchase
Fossil Charcoal as Palaeofire Indicators: Taphonomy and Morphology of Charcoal Remains in Sub-surface Gondwana Sediments of South Karanpura Coalfield Available to Purchase
K-rich Titanate from the Jharia Ultrapotassic Rock, Gondwana Coal Fields, Eastern India, and its Petrological Significance Available to Purchase
A New Cynodont Record from the Lower Triassic Panchet Formation, Damodar Valley Available to Purchase
Automatic gravity optimization of 2.5D strike listric fault sources with analytically defined fault planes and depth-dependent density Available to Purchase
First-cycle sandstone composition and color of associated fine-grained rocks as an aid to resolve Gondwana stratigraphy in peninsular India Available to Purchase
A stratigraphic problem in most Gondwana basins in peninsular India has persisted for more than a century. Originally, in the type area of Damodar valley, the stratigraphy was established based on the order of superposition without the aid of fossils. However, fossils were used to classify the Gondwana succession into Lower Gondwana (Early Permian to Late Triassic), characterized by Glossopteris flora (considered to have become extinct by the end of Triassic), and Upper Gondwana, which has Ptilophyllum flora (Jurassic). The problem started as the work extended further outside the type area, where Glossopteris flora was discovered in Upper Gondwana rocks of Early Jurassic age. At this point, fossils took precedence in determining the relative age of strata under the assumption that Glossopteris flora could not extend beyond the Triassic. Therefore, Glossopteris -bearing Upper Gondwana–looking rocks were assumed to be of pre-Jurassic age. Thus, Upper Gondwana rocks were relegated to Lower Gondwana status. The confidence on fossils to determine the relative age of strata was so strong that the necessity to confirm their relative age based on the law of superposition was thought unnecessary. This happened in spite of the fact that ages based on a fossil are conceptual entities, whereas establishing the order of superposition is the ultimate proof of relative age of strata. Gondwana sedimentation coincided with the global climatic change from an ice-house state in the late Paleozoic to a greenhouse state in the Mesozoic. Climate played the most important role in controlling sandstone composition and other lithological attributes. A strong correlation between sand/sandstone composition and climate is well established. Any perceptible change in climate brings a perceptible change in sand/sandstone composition. Such compositional transition would be expected in the stratigraphic column as the climate changed between the two extremes. Sandstone composition of the Gondwana succession in the Raniganj basin, India, supports such a hypothesis. In addition, color of fine-grained rocks in the Gondwana succession, which to some extent is also influenced by climate, uniquely identifies each lithostratigraphic unit. Stratigraphy must be based on the law of superposition. But sandstone composition along with the color of fine-grained rocks could serve as additional criteria to stratigraphic interpretation. Such an approach may be useful in structurally overturned sequences and in reconstructing the subsurface stratigraphy from borehole cores.