Some Engineering Problems Of The Panama Canal In Their Relation To Geology And Topography

DEPARTMENT OF THE INTERIOR BUREAU OF MINES VAN. H. MANNING, Acting Director BULLETIN 86 PLATE IV GltLF OF PANAMA (O. .ç $ S Cerro Bruja I «< TOK lL Sta.Rita Mt. Teis Escobjed Obispo Tortola I Pt.Vaca monte 1 o 6 8Q°joQ' LONGITUDE WEST I FROM GREENWICH | IIP' MacDonald. By Donald F. zee/ Kilometers 10_______11 t_SrJ I.Changarmi *Pt. Bruja nado I. Miles 5_______ New Porto Bello /.C.C.Quarry Pt. Coca I San Buenaventura ls/& JSrten^cveJvtzcr'cc Cove Saximo Mt. X o o Cç iL ) Pt. Dieéo Scale, of* Miles Naranjos 1.^ M uerto I.O’/?! o Pt.Toro 1 S N'ax'aiijitojs 30' \ Nombre de* /.C.CSand Pi Fort LorenzoiFtuins) Area of G a tun Lake at e!ev.+ 85 ft., 163.38 sq. mi. ; o’ Base map by Isthmian Canal Commission. Qsc Swamps and coral flats I . _v_____) Pleistocene San Juan & f d W H .U" S ro Gran (1000-ft) Tes mTraflores lo Ciio6U .fi. , g>?2. ' I " □ 0 /% I Melones I. -r , , . Moroi. Taboga l>V9 i Village GENERALIZED GEOLOGIC MAP OF THE CANAL ZONE Toro limestone Panama tuffs Pliocene 0 5 TERTIARY Rhyolite Gattin formation Caimi t o sandstone, tuffs, etc. Etnperiidor Culebra and limestone (’ucuracha shales, tuffs, a>id clay rocks Bohio conglo- merate and sandstone Busalt and andesite Oligocène Miocene ? o 00- c œ Io Old Pa X Igneous complex — grano- diorite, metabreccis, Las Cascades agglomerate, Bas Obispo breccia, old tuifs (includes small areas of many of the other forma- tions)