THE

AMERICAN GEOLOGIST

A MONTHLY JOURNAL OF GEOLOGY

AND

ALLIED SCIENCES

EDITORS AND PROPRIETORS

PROF. SAMUEL CALVIN, University of Iowa, Iowa City, Iowa.
PROF. EDWARD W. CLAYPOLE, Buchtel College, Akron, O.
DR. PERSIFOR FRAZER, Franklin Institute, Philadelphia, Penn.
DR. LEWIS E. HICKS, University of Nebraska, Lincoln, Neb.

MR. EDWARD O. ULRICH, Geol. Survey of Illinois, Newport, Ky.

DR. ALEXANDER WINCHELL, University of Michigan, Ann Arbor, Mich.

PROF. NEWTON H. WINCHELL, University of Minnesota, Minneapolis, Minn.

VOLUME I

JANUARY TO JUNE, 1888

MINNEAPOLIS, MINN.

1888

PRINTED BY THE UNIVERSITY PRESS, STATE UNIVERSITY

Introductory.

CONTENTS.

JANUARY NUMBER.

A short history of the origin and acts of the International

Congress of Geologists, and of the American com-

mittee delegates to it. [1]. PERSIFOR FRAZER,..........

The Animike black slates and quartzytes, and the Ogishke

conglomerate of Minnesota, the equivalent of the

"Original Huronian." N. H. WINCHELL,.......

The unconformities of the Animike in Minnesota. [Illus-

trated.] A. WINCHELL,....

A new species and new genus of tubicolar Annelida. S.

CALVIN, .

....

3

II

14

24

28

31

Notes on the formations passed through in boring the

deep well at Washington, Iowa. S. CALVIN,

The future of natural gas. E. W. CLAYPOle,.

Editorial Comment.- Geology in the educational struggle for existence,

36.-Irving and Chamberlin on the lake Superior sandstones, 44.

Review of recent literature.-Geological Survey of New York; vol. vi;

paleontology, 58.-Monticuliporoid corals of the Cincinnati group,

U. P. and Jos. F. JAMES, 59.-Spiral bivalve shell from the Waverly

of Pennsylvania, C. E. BEECHER, 60.—Morphology of the summit

plates in blastoids, crinoids, and cystids, WACHSMUTH and SPRINGER,

61.-Morphology of the carinæ upon the septa of rugose corals

MARY E. HOLMES, 61.-Primordial fossils from the N. W. territory

of Canada, C. ROMINGER, 61.-Untersuch, u. Gest. u Min. aus W.

Indien, J. H. KLOOS, 61.- Preliminary report on petroleum and in-

flammable gas, E. ORTON, 62.-The lake-age in Ohio, E. W. CLAY-

POLE, 63.-The West American Scientist, 64.-Bulletin No. 39, U. S.

Geol, Survey, WARREN UPHAM, 64.- Preliminary reports on the

S. E. Kentucky coal fields, CRANDALL and HODGE, 65.-Annual

report on the geological survey of Arkansas, JOHN C. BRANNER, 65.

-The American Magazine; natural gas at Findlay, Z. L. WHITE, 65

Personal and Scientific News, 66

FEBRUARY NUMBER.

The Niobrara river considered with reference to its cap-

acity for irrigation. L. E. HICKS ....

69

The flora of the Coast islands of California in relation to

recent changes of physical geography. JOSEPH L.

CONTE

76