This Coquina formation has always caught my attention and this morning I had the right tide and sky to try a comp I have been pre visualizing for months.
Canon 6D, 16-35 at 17mm, f/16 at 25s for the foreground image, f/16 at 6s for the sky, manual mode, evaluative metered, ISO 200, Two image blend in PS and optimized using luminosity mask.