Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, and mollusc shells. The major minerals of limestone are calcite and aragonite, different crystal forms of calcium carbonate.
Sinkholes are common where the rock below the land surface is limestone or other soluble rock, such as gypsum, that is dissolved by ground water. As the rock dissolves, spaces and caverns develop underground. Sinkholes vary in size from 1 to 600 meters in diameter and may have similar depth. Sinkholes may form gradually as pipes or tunnels, or suddenly due to roof collapse.
At GZ observe and measure the cenote or sinkhole. You need to provide answers to these questions and you can log your find.
Q1. Do you think the cenote in front of you was caused by dissolution of soluble rock or roof collapse? How did you come to this conclusion?
Q2. How deep do you think the cenote is? Your best estimate here is fine - please do not disturb the moisture sensor logger at the end of the rope
You may go ahead and log your find without waiting for confirmation, but I will delete any logs where I don't receive answers, or your answers are shonky and indicate you probably weren't there...
Please watch kids and pets, the cenote is not fenced