No. 15.— Notes on the Geology of the Island of Cuba, based upon 
a Reconnoissance made for ALEXANDER AGassizZ. By RoBErT 
T. HILL. 
PAGE PAGE 
Wetter orebransmittal is) <a «) sot co po aae The Modern or Tripartite Bench 
Introduction .. - 243 Elevation and the Elevated 
I. Elementary Geolose Structure, - . 246 Reet. er awa 276 
The Pre-Tertiary, Metamorphic, Inquiry into iy iden aE Mee 
and Igneous Foundation . 246 nating Subsidence . . 277 
The Pre-Tertiary Sedimentaries. 247 Absence of Upland Deptakon 278 
The Tertiary Subsidence . . . 248 The Testimony of the Harbors 279 
The Post-Tertiary Folding . . 253 Absence of Fiords and Estu- 
The Post-Tertiary Formations . 254 aries . . 280 
II. Geologic History recorded oy the Absence of Taree. itl Be 
Topography . sof ae 258 vived Stream Valleys . . 280 
General Topography . . . . 258) III. Résuméand Conclusion. . . 282 
Topography of the Inland. . . 289 History of the Island SS 282 
The Topography of the Coasts . 264 Obscureness of Pre-Tertiary 
Terraces and Benches . . 267 History . . . 282 
The Soboruco or Elevated Reef Evidence of leer Mania 
Bevel! - 3. = : 268 Waters to North and 
Beach and Cliff Pervaces! Sy aye ete South of Cuba during the 
The Cuchillas of Baracoa . . 269 two Cretaceous Epochs . 283 
Older Higher Levels of the Tertiary Subsidence regional . 284 
Yaougue EVPGs. <3 lease 269 The Continental Shore cn 
The Havana Levels . . . 270 this Epoch . . 284 
The Moro and Cantera ae The Orogenic ee e 
Cle tre heey Eel et a7) Close of Tertiary Time not 
The Matanzas Levels. we er rk: indicated in North Amer- 
The Santiago Levels. . . 274 : ican History . . 285 
Comparison and Correlation of Reflections on the Charstter of 
various Levels . . 275 the Pleistocene Regional 
Two Great Periods of Pleisto- Uplitts: ya, sees 285 
cene Regional Elevation . 275 Absence of known Redenee ne 
The older Yunque Elevation any former Union of the 
and succeeding Period Island with Continents. . 285 
of Base Levelling . . 276] Description of Plates... .. . . 287 
LETTER OF TRANSMITTAL. 
WasHINncTon, D.C., May 1, 1894. 
Dear Sir:—TI beg to submit the following report upon my recent 
studies in Cuba, undertaken at your expense and under your direction. 
I left Washington, D. C., Sunday, February 11, arriving at Havana 
on the following Wednesday. A day was spent in Havana to ascer- 
VOL. xv1.— no. 15. 
