UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



, 5, No. 6, pp. 81-94, PI. 10 ANDREW C. LAWSON, t 



NOTES ON LAWSONITE, COLUMBITE, 

 BERYL, BARITE, AND CALCITE. 



BY 



Arthur S. Eakle. 



CONTENTS. 



PAGE 



Lawsonite 82 



Introduction 82 



Occurrences in California 83 



Analyses 85 



Conclusion .• 86 



Columbite 87 



Introduction 87 



Occurrence 88 



Forms 88 



Measurements 88 



Beryl 89 



Occurrence 89 



Forms 89 



Tubular Calcite 89 



Occurrence 89 



Description 89 



Barite 90 



Occurrence 90 



Forms 90 



Measurements 90 



Calcite from Terlingua, Texas 91 



Occurrence 91 



Habit 91 



Forms 91 



Measurements 92 



Prisms 92 



Pyramids 92 



Positive rhombohedrons 92 



Negative rhombohedrons 93 



Positive scalenohedrons 93 



