A stratigraphic column, consisting of formations a, b and c (from bottom to top), having mutual gradational contacts, is characterized as follows: c-shore-face

A stratigraphic column, consisting of formations A, B and C (from bottom to top), having mutual gradational contacts, is characterized as follows: C-shore-face sandstone B- inner to middle shelf sandstone-shale alternation A-outer shelf mud with occasional thin sandstone What does this stratigraphic column indicate transgression or regression? Justify. Which formation has the sandstone with the least matrix, and why? Which formation has the most rounded sand grains?