Been trying to tell you guys all along this part of our planet kicks serious ass! Though few have the sack to run what these guys do ,there is plenty of similar stuff on a smaller scale for the rest of us. As far as the geology they said travertine which typically forms staircases of falls with distinct turquoise color ,like AguaAzul over 500 falls from 3 to 80 ft. in 3 miles of river[multiple channels].There is volcanic and granite geology in the region as well and sometimes wierd combinations.
They didn't even mention other sections of the Santo Domingo where river runners have had hostile encounters with locals and bandits.
Chiapas is culturally more like Guatemala than Mexico and is super mountainous tropical jungles full of ruins and indigenous peoples,it aint no Cancun or Tiajuana.