Che Journal of Geology 
Published on or about the following dates: February 1, March 15, May 1, June 15, 
August 1, September 15, November 1, December 15. 
Vol. XX CONTENTS FOR JANUARY-FEBRUARY, 1912 No. 1 
THE PERMO-CARBONIFEROUS OF NORTHERN NEW MEXICO - - - S. W. WILListon AND E. C. CasE I 
ON THE DISTRIBUTION OF LOWER TRIASSIC FAUNAS ah rene Lin = - -  Jamers PERRIN SMITH 13 
PANTYLUS CORDATUS COPE -. =. -*% -..- -- Bua at ahaa mei DS Mavricr G. Ment at 
NOTES ON TERTIARY DEPOSITS NEAR COALINGA OIL FIELD AND THEIR STRATIGRAPHIC RELA-— 
TIONS WITH THE UPPER CRETACEOUS - - - - = Se ea i eat oe Eel. DUMBER ES 
KAURI GUM MINING IN NEW ZEALAND - - - eee a pe es SER. ALE, PENROSE; JR: 2038 
PRELIMINARY.NOTES ON SOME IGNEOUS ROCKS OF JAPAN. V  - =~ - = = = = 8. Kézu 45 
GRAVEE ASFA RESIS TAIN: RO CK teen cotati ner ere oe ere tyme ee ie SIDNEY PAIGE — 40 
SOME OBSERVATIONS AND EXPERIMENTS ON JOINT PLANES- - - - -  -  Prart SHELDON 53 
PETROLOGICAL ABSTRACTS AND REVIEWS  -_ - Siegen ES KAAS SRE CRC paaneere = 80": 
REVIEW Sei dioewc 8 Liao mi aioe hs ears aster ae E G PP 
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ee Par ee ve 
