GeologyRocks

• Location: Quarry near Coco Bay Hotel, Antigua, Caribbean
• Date Taken (dd-mm-yy): 17/01/2008

I think this is an altered limestone reef (Oligocene) that formed at the same time that the main volcano of Antigua was forming. As the volcano became less active, small reefs - only 10s of metres in size would form along the sides. As the volcano was active, the relative sea level would rise and fall rapidly, causing drowning or emergence of the reefs. However, later eruptions would occur, covering the reefs and altering them. This may be one such reef (the lighter grey area, whereas the red/brown rock is basalt). Boulders nearby of the grey rock looked like altered limestone, which is why I think this is an altered reef. The cliff is some 8m metres high in total.