BGYCT-137 · December 2025 · English
IGNOU BGYCT-137 December 2025 Previous Year Question Paper
STRATIGRAPHY AND PALAEONTOLOGY
Structured previous year question paper for BGYCT-137, December 2025 session.
Max marks: 50 · Questions: 4
Verified: 10 Aug 2026
BACHELOR OF SCIENCE (GENERAL)
(BSCG)
Term-End Examination
December, 2025
BGYCT-137 : STRATIGRAPHY AND
PALAEONTOLOGY
Time : 2 Hours Maximum Marks : 50
Note: All questions are compulsory. Marks
allotted for each question are indicated
against it. Draw well labelled diagrams,
wherever necessary.
Q1.Briefly answer any five of the following questions : 5x2=10
(a) What is rock formation ?
(b) List the names of geochronologic units.
(c) Name the three groups of the Delhi Supergroup.
(d) What is the main lithology of Triassic succession of Spiti ?
(e) Define law of priority.
(f) Differentiate between compression and impression.
(g) Differentiate between bivalves and brachiopods.
Q2.Write short notes on any four of the following : 4x5=20
(a) Morphological features of a brachiopods
(b) Define the terms taxodont, heterodont, univalve, sinistral and dextral.
(c) Plant fossils
(d) Methods of stratigraphic correlation
(e) Mesozoic stratigraphy of Rajasthan
(f) Geological time scale and its major units
Q3.Answer any one of the following : 10
(a) Define stratigraphy and discuss its various principles (in detail).
(b) Discuss in detail the conditions and processes of fossilization.
Q4.Answer any one of the following :
(a)
(i) Describe the morphological features of ammonoid. Give neat well labelled diagrams in support of your answer. 5
(ii) Discuss the geological history of trilobites. 5
(b)
(i) Describe stratigraphy of the Cuddapah Supergroup. 5
(ii) Give an account of stratigraphy of the lower Gondwana _ sequence. Add a note on its economic importance.