- Stratigraphic boundary problems are an important component of describing the geology and stratigraphy of India.
- Stratigraphic boundaries separate rocks of significantly different environments or lithology.
- Stratigraphic boundaries are ideally defined by distinct lithological, geochemical, and palaeobiological signatures, to which a chronological framework can be applied.
- Stratigraphic boundaries are determined by one or more of geological events such as
- volcanic activity,
- sedimentation,
- tectonism,
- paleo-environments &
- evolution of life.
- Faunal records have played a major role in determining the boundaries of the Phanerozoic units.
- The other geological events are dated on the evidence of fossil records.
- Boundary problems refer to the process of demarcating stratigraphic boundaries and addressing the challenges that may arise.
- Marking sequence boundaries is not a straightforward exercise.
- Ther are four important boundary problems in Indian stratigraphy: