We usually hike in the El Yunque rain forest in the north-east of Puerto Rico, but it is possible to find great forest hikes all over the island. One place we found to explore is the Guajataca Forest (pronounced gua-ha-TA-ca) in Isabela. It is in the karst region of Puerto Rico,...
Table 1 Summary of the geographical extent (area) and chronology (ka cal BP)5,13LRJof the main Upper Palaeolithic traditions in Europe and the Near East during the Transition, arranged in two classification models, with Model B being the one presented here. Full size table On the southwestern...
Volcanic caves, most of them lava tubes, have a constructive rather than erosive origin, are exactly the same age as their host rock, and become destroyed in a very short geological time span compared to karst ones [5]. This, together with the fact that the whole volcanic areas have much...