Petrified Wood Outcrop

HAZZARD, J. C., 1954, ROCKS AND STRUCTURE OF THE NORTHERNPROVIDENCE MOUNTAINS, SAN BERNARDINO COUNTY, CALIFORNIA,IN JAHNS, R. H., ED., GEOLOGY OF SOUTHERN CALIFORNIA:CALIFORNIA DIVISION OF MINES BULLETIN 170, CHAPTER 4,P. 27-35, MAP SHEETS.MOYLE, P. R., AND OTHERS, 1986, MINERAL RESOURCES OF THEPROVIDENCE MOUNTAINS STUDY AREA, SAN BERNARDINO COUNTY,CALIFORNIA: U.S. BUREAU OF MINE OPEN-FILE REPORTMLA 47-86, APPENDIX B, NO. 143, P. 297.STRONG, M. F., 1966, DESERT GEM TRAIL--A FIELD GUIDE TO THEGEM AND MINERAL LOCALITIES OF THE MOJAVE DESERT, COLORADODESERT, AND ADJACENT AREA OF NEVADA AND ARIZONA: MENTONE,CA, GEMBOOK, 81 P.