A 2m square (ish) quadrat of chalk bed and flint reef from Cromer, Norfolk, UK. 1 cam video 90 secs capture time, approx 100 images, crosshatch capture. GoPro Hero 5. Dive knife for scaling and orientation (pointing North).
This is an example of a model that could be produced by a Seasearch diver with an underwater camera, as part of a normal recreational dive. This is a chalk bed habitat from EA20/230, 9/9/2020.