Hard, white limestone-like rock that is found in alkaline
soil, usually near the beach.
Ong pagali nira ta wi, mga tolong depa ba-lo kinabot tang tapik.
When they were digging the well, the depth was about
three arms-span-measures before reaching the limestone
layer.
When the limestone layer is reached, most people stop
there. If digging is continued through the limestone, there
will be more water but it will be salty. This limestone layer
is not seen in wells further away from the beach.