MESOZOIC SYSTEMS ALONG THE PACIFIC 



263 



In the Winnemucca, Golconda, Mt. Tobin, and Mt. Moses quadrangles 

 of west-central Nevada (column 7, Fig. 17.2; area denoted as W-G— T-M 

 on Fig. 17.7) the late Paleozoic Antler orogeny is strikingly displayed, as 

 well as strong orogeny in mid-Permian time. Volcanism in late Permian 



^OUNLAP 

 FOR. 



[Jdv - voiconics and sediments 



Jdt • Conglomerates ond fonglomerate 



I Jds • Sondstone 



STAGE J 



SUNRISE AND „ , 



GABBS FOR. Js " Limestone ond sholt 



i*ptlu -Massive limestone and dolomite 

 Tils -Shale with conglomerate lenses 

 XI - Thin oedded limestone 

 >ec-Chert 

 ,tteg-Greenstone ond breccia 



EXCELSIOR 

 FOR. 



yn^^" " frj 



rW^N 



)' MM 



p$~2 



^Sff^^^ 







/jfcss 



Z.^^9r 





Wz 





/*'t»^ 





j&y 





W^Mi^S 



b^ HI'/ 







I 



Fig. 17.4. Development of complex structure in the northwestern port of Pilot Mountains, Haw- 



' thorne and Tonopah quadrangles, Nev. From Plate 3, Ferguson and Muller, 1949. Stage 1, 



* folding near margin of Luning embcyment and deposition of conglomerate and fanglomerate of 



the Dunlap formation. Stage 2, development of Mac thrust. Deposition of coarse material and 



folding of Mac thrust. Stage 3, further folding with development of Spearfish thrust. Movement 



toward the trough was along an erosion surface cut on the upper plate of the Mac thrust. 



I, Stage 4, development of five other thrusts and intricate folds. The relative length of the four 



diagrams indicates the postulated shortening of the stratigraphic section involving the Triassic 



and Jurassic sediments. 



QOLOONOA QUAO) 



Fig. 17.5. Map showing inferred extent of Tobin and Golconda thrusts. Reproduced from 

 Ferguson et al., 1951. 



