Bulletin No. 206 . Series 0, Systematic Geology and Paleontology, 60 DEPARTMENT OF THE INTERIOR UNITED STATES GEOLOGICAL SURVEY ' CHARLES D. WALCOTT, DIBECTQK A STUDY FAUNA OF THE HAMILTON FORMATION OF THE CAYUGA LAKE SECTION IN CENTRAL NEW YORK. HERDMAN FITZGERALD CLELAND WASHINGTON GOVERNMENT PRINTING OFFICE 1903 CON TE N T S. Page. Letter of transmittal, by Henry S. Williams __..-_-_._-----.-.------.---.. 7 Introduction, by Henry S. Williams.-----.--.-.-..---.----.-------------- 9 Preface-.-..-...-..-..-----..-...-. ...................................... .11 Chapter I. General description and general geology of Cayuga Lake region. 13 General description.____._._._._--.---___-_._._....__._.-__.___._---._ 13 General geology .... ............--.-----.._---...--..--.-.-..--.-... 14 The lake section.............-..-.....-....----.--....--_--.-..-.. 14 Hamilton formation ........ ....---..-._-...........-..---...... 14 Encrinal beds.--.-.._......-. ........'.......-..--......-....--.. 15 Concretionary layers......;...--...-.......-. .......-.-----.-.... 15 Jointing......................................................... 15 Tullyfold-.............................................. ----- .- 15 Chapter II. History of the Hamilton formation ........................... 17 McClure............".........-...............-......-................ 17 Eaton ..........................:..................................... 17 Werner .............................._............................:.. 17 Early attempts at correlation..___,..__.________.__._.._____._________ 17 Search for coal ..-....-.-.--...---..-. ..-----..---.--..-----...-.... 17 Conrad and Hall. ...... .............................................. 18 Verneuil's correlation._................:............................. 19 Renevier's correlation......... .-.--.....------.--.---.--.-...-....-.. 19 Williams's correlation ...................^....................... .... 19 South American Hamilton .................. ................... .... 19 Chapter III. Descriptions of the f ossiliferons zones .I.................... 20 . Hamilton-Onondaga (Corniferons) zone .-...- _-_._------_.-_--___.. 20 First LeiQrhynchus zone (Marcellus shale) ....... ................_.. 22 Second Leiorhynchiis zone ......................... .._.-..--.-.--.-.. 23 First Terebratnla zone (Basal limestone of Clarke) ....--....._....... 23 * Third Leiorhynchus zone _-....-.-.----..-......-.----..._----.-...--. 25 Michelinia zone (provisionally) .---.-.---..--......--.--.............. 25 Chonetes vicinus zone. -:-.......---.........-.....-.-. ..-.-_.-...-.--. 26 (Transition zone) .-............... _-.-...-.......-..-.-----..-.-..-... 26 First Cypricardellabellistriata-Athyris spiriferoides zone ..----...---. 26 Tellinopsis zone --.-.............---_-.-------.-.------.----.-.-.. ..... 26 Second Cypricardella ballistriata-Athyris spirif eroides zone............ 27 Second Terebratnla zone (Encrinal beds) ......... ......-.--.--.-.-.-. 27 Orthonota zone ...................... ........ ..^......^.............. 27 (Transition zone).............. -..--....--.-.. .-'.-..-.----..---.--.. 28 Chonetes zone .---....---.. ...-...---.-.--.-..-.-.-----.---........--. 28 First Ambocoalia zone ....................... ....:................... 28 Chonetes lepidus zone (rather barren shales) ..-.--...-..-....--.-...- 28 3 4 CONTENTS. Chapter in, Description of the fossiliferous zones Continued. Page. Second Ambocoelia zone......---.--...--..--...-.....---.-...--....... 29 Stropheodonta-Coralline zone. ....^................................... 29 Modiella pygmsea zone---------------------------_-_--------._------. 30 Ambocoelia praeumbona zone. ---------._---------_----.-.----.--..... 30 Orbiculoidea or modified Leiorhynclms zone--_--.------__------__-.-. 30 (Transition zone) ....'................................................ 31 SpiriferrAtrypa zone. .^............................................... 81 Cystodictyazone.------_-.-_-__----------_---..--_--.---.-----..'_-... 31 Explanation of diagrams on PL V ___________.._.____.__.__.__._.._____ 32 Chapter IV. Annotated list and classification of species found in the Hamilton formation of the Cayuga Lake section........................ 35 Coelenterata........................ .------- --.....--.:....--.---._-.. 35 Anthozoa-Actinozoa -...--------.--..-.-.-............---........ 35 Echinodermata...............-.'.-_---.---------.--.......--..-.-.---- 38 Crinoidea -__._.________.-___.-__...___-___-_____....__---_______. "38 Vermes _._.._--_._.__________--_---__---_-_- __-_-_._--_l__--------.__ 39 Molluscoidea --...-.----------------._-. -._.--.-...---._---------.--- 39 Bryozoa._..._......'....--........-...................---.--..-.. 39 Brachiopoda.--.-- _--.----_-----_----.-:_-_-------..----_--_--.. 40 Mollusca _____.__..--__-__..-.----_--------_- ---_.._-_.._------.._._. 59 Pelecypoda...._........---.--...-..---....--.............--.----. 59 Gasteropoda.-... .......-,------.---..-----..-.---....--.....-... 73 Cephalopoda....... .....------------.---...............-......... 77 Arthropoda.........._...-............................-. ............. 79 Crustacea ___._______..__.-..-_--._.__._.__.....____.._ .......... .79 Plantse..... .......................'...........--... .....,............. 82 Chapter V. Comparison of the Cayuga Lake section with other sections of the Hamilton formation. ______-.-.-._._.________________._______.______ 83 Basal limestone.--..-_---_-----.--------------_-...--.-_...-..-------.- 83 Encrinal beds -...-.........,---.--------..................-.--------- 84 Gasteropoda................-..-_-.----....................-------_-.. 85 Use of the terms '' upper'' and '' lower'' Hamilton faunas....----.-... 86 Explanation of diagram, fig. 3.:......... r ............................. 87 ChapterVI. Conclusions................................................. 89 Chapter VII. Bibliography of litei'ature used in preparation of this paper.. 92 Appendix. Table showing vertical distribution of faunal zones, with their contained faunules, in the Hamilton formation of Cayuga Lake, New York....... ......................-......'................-........-... 95 Index-.....:......--.---...---.........-----....-....----.---............ 107 ILLUSTRATIONS. Page. PLATE I. Geologic map of Cayuga Lake region_.--.....-..-..._---....... 14 II. Jointing in the Upper Hamilton shales at Shurger Glen (fall over the Tully limestone) ......................................... 16 III. A, Tully limestone south of Shurger Glen; B, Encrinal beds show­ ing dip to the south, south of Shurger Glen...--.--..-..---... 18 IV. Alternation of impure limestones and shales above the Onondaga beds at Union Springs .......-... .--.-......---..---.---.---- 20 V. A, Diagram showing the relative abundance of Pelecypoda and Brachiopoda in the Cayuga Lake section; B, Diagram showing the relative abundance of individuals and species in the Cayuga Lake section....................'..............-.............. 32 FIG. 1. CayugaLake section..............'........,......----..---....... 14 2. Zones in Cayuga Lake section .................................... 21 3. Diagram showing the distribution of fossils of the Hamilton forma­ tion throughout New York State---.--...--.-...-.--_---_.._. 87 5 LETTER OF TRANSMITTAL. YALE UNIVERSITY, New. Haven, Conn., June S3, 1902. SIR: I have the honor to transmit herewith, for publication as a bul­ letin of the United States Geological Survey, the manuscript of a paper entitled A Study of the Fauna of the Hamilton Formation of the Cayuga Lake Section in Central New York, prepared at my suggestion by Herdman Fitzgerald Cleland. Respectfully, yours, HENRY SHALER WILLIAMS, Q-eologist and Paleontologist. Hon. CHARLES D. WALCOTT, Director of United States Q-eological Survey. INTRODUCTION. By HENRY SHALER WILLIAMS. The following paper is a contribution to the knowledge of the fossil faunas of the Devonian of the United States. It was begun by Mr. Cleland as a piece of research work in the course of study for the doctorate degree at Yale University, and was used as a thesis in taking the degree of doctor of philosophy in June, 1900. During the summer of 1901 some additional work was put on it, based upon more extended field work. The value of the investigation consists chiefly in the statistics it furnishes as to the approximate composition of each of the successive faunules making up the total fauna occupying the Hamilton forma­ tion of central New York. In it account is given of the species obtained in a careful and full examination of every foot of the sec­ tion from the top of the Onondaga (Corniferous) limestone to the base of the Tuily limestone, both of which are well marked in the Cayuga Lake section, thus constituting definite limits for the Hamilton for­ mation of this particular region. All the fossiliferous zones (seventy-six in number) were examined, and upon analysis of the faunules of each zone those which were so closely alike as to signify practically the same set of species, associated in the same biological equilibrium of relative abundance, were grouped together, constituting in all twenty-five separate faunules. These may property be described as the faunules of the twenty-five suc­ cessive hemerae into which the Hamilton epoch of this section may be distinguished by its fossils. These faunules are associated with more or less definite changes in the character of the sediments in which they were buried. The separate divisions of the formation thus recognized by slight