. Occasional papers of the California Academy of Sciences . Rio GaTun Madden Like. 66 CALIFORNIA ACADEMY OP SCIENCES [Oc. Papers of strikes of which N. 25° W. to N. 30° W. are the most common. Some-thing over 4,800 feet of Oligocene and Eocene limestones and shaleswith interbedded volcanics is exposed before reaching the crest ofthe divide between Rio Sabana and Eio Cucunati drainage. Here thestrata flatten out and on the west side dip at low angles toward theCucunati. On the west side of the Cucunati valley this low-dippingwestward inclined Eocene is cut off by a cliff of basement
. Occasional papers of the California Academy of Sciences . Rio GaTun Madden Like. 66 CALIFORNIA ACADEMY OP SCIENCES [Oc. Papers of strikes of which N. 25° W. to N. 30° W. are the most common. Some-thing over 4,800 feet of Oligocene and Eocene limestones and shaleswith interbedded volcanics is exposed before reaching the crest ofthe divide between Rio Sabana and Eio Cucunati drainage. Here thestrata flatten out and on the west side dip at low angles toward theCucunati. On the west side of the Cucunati valley this low-dippingwestward inclined Eocene is cut off by a cliff of basement contact is apparently a thrust fault (F. 8), or series of thrustfaults dipping west at a high angle (structure section C-C), (F. 8,fig. 4). The section between the Sanson and the Cucunati is one ofthe mostly tightly compressed and intricately faulted areas betweenLake Nicaragua and the Atrato Eiver, fronted on each side by anadvancing overthrust and broken into a mass of squeeze blocks whichwould be almost impossible to map in detail. The soft Oligo-Mioceneshales are so inc
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectscience, bookyear1890
