Describe the lithology, type locality, age and depositional environment of Blaini Boulder Bed.
Lithology: It primarily consists of tillite or diamictite, which is a poorly sorted, matrix-supported sedimentary rock. It contains a diverse array of angular to sub-rounded clasts (boulders, cobbles, pebbles) within a finer-grained, often argillaceous or sandy matrix. These clasts are typically lithologically varied, including quartzite, limestone, granite, and schist, reflecting their origin from various bedrock sources. Some clasts exhibit faceted or striated surfaces, characteristic of glacial transport.
Type Locality: The formation derives its name from the Blaini section near Mussoorie, Uttarakhand, in the Lesser Himalayan region of India, where it is well-exposed.
Age: It is unequivocally assigned to the Late Proterozoic (Neoproterozoic) Era, specifically correlated with the Cryogenian Period, roughly 700-600 million years ago.
Depositional Environment: The Blaini Boulder Bed represents a glacial or glaciomarine environment. Its characteristics point to deposition directly from glaciers (till) or by icebergs melting in shallow marine settings (glaciomarine diamictite), indicative of a widespread, significant period of glaciation.
Answered By:
Discuss the position of Asteroid belt within the solar system and comment on the composition of meteorites.
What are sheath folds? Discuss the deformational conditions of their formation.
What is Global Positioning System (GPS)? Explain its geological applications.
Discuss the statement giving suitable examples. "Physical weathering adds to the effectiveness of Chemical weathering".
Discuss the types of Penetrative and Non-penetrative lineations with the help of suitable diagrams and throw light on their genesis.
Discuss favourable conditions for fossilization.
Discuss different concepts of biozonation with neat diagrams.
What engineering properties make Marble, Sandstone and Granite useful as building stone?
Explain different generic type of water and their significance in water supply.
What do you understand by continental drift? Discuss various geological evidences in favour of continental drift.
How will you manage a case of misplaced copper-T (Cu-T)?
Describe the embryogenesis, clinical features and principles of management of cleft palate.
Write short notes in 150 words:
Metagenesis
Write short notes in 150 words:
Book lungs
Write short notes in 150 words:
Paedomorphosis