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Show 54 i•~x . J)oc.. 'No. 41. Fo~sil JFooch. 'There ar<· two ::-pel imln~ of th~·s ; one a scmi-opali ed fragment from Wett mountain, near the Spanish peaks, the other a. ilicious pebble from t. Ana . Neither of them retain the original stru turc 111 ufficicnt perfection for d<' h ·rrn ination of its r·haracter by the mtnosco pE•. . V'on-fo. s il~f'erous rocks. The mo~t intcre. ting specim 'n of rocks were the following: 1st. From the eaiion of Vegns: A. fragment of well character- 'Zed granite, anrl anotht>r of mica .latc. 2cl. San Miguel: A rcddi. b decompo iug granite. 3d . }> u r g a 1 or y Y all r y : A h 1 a c k . I at<' . 4th. Cafion fnfirrno: A com pad hornbl<,rHiie mas:, "ith red "JW e k s, pro b a b 1 y a t rap rock . 5th . W (> ~ t of t h c Rio P 11 c· rc· o : " A w 11 it e clay, u · c '1 for whitewashing." This is a ralcarcou~, rathrr ~oarsr grained ma~ s, with oecasional grains of sili<'iou sancl and pc·bhlcs; it dl'crYl'SC<'. briskly with acitb, and tar-;t es strong!) of lime after heing heated by the blow pip<.· . J l c on t a i n s n o p o 1 y t h a I am i a. 6th. Top of lit t le knoo]._ near" Rin Vc>rm ·jo:' fn n state of d<' ·omposition, hut n·~t>mbl("' ~.n in<luratP<l sand ·tonf•. • JI.I i n fl' 11! s . TiH min('l'als arc tno.lly of litt l (• interest. The ore. arc not rich ·u tlH!Ill!H•ln.·s, nor <:C\n they be relied upon to determine the value (' f t h e m i n s. 'I' 11 c go 1 <1 or~ s from " V i (' j o H e a l , " " ~, u e r 1 o , " & c. , ton..,ist chiefly of rcl lular quart:.-:, di!'colore<l by oxide of iron, and rarely showing any particles of gold. The <'Opper ore ar chiefly dtrysalla atHl green carbonate of copper. Below arc given the true n ames of some specimen._, to whiL·It were attnc·hcd the label. ~opied in t h c fir!' t c· o 1 u m n. 1st. moky ()Uartz from l> a,lilla : A nodule of obcidian; fus~s ea. ily 'by the blow-pipf'. 2d. alt from the Laguna ncar Cl1ilil : 'l'wo layers, one of chloride of sodium, the other of . ulphatc of magne ·ia . _:1d. B l oFo~om of the gold, Tuerto: Quartz in smalJ <·longatcd pnRm:. 4 t h . F r Q m h d w e c n Hit o ,t n d H i n P u <-' r co : A n o d ul e o 1 whit c co tnpad gyp um. '> t h . F r o lll b c t w c ('ll r o b 1a ~ o P H n <1 C' i b o l <-' u a : ., m a 11 . p l at c s of ~clcnitt>. Gt lt . J3Plen nbur dant in :-tll •ht· siura. : Hand ·orne plates of silwitc. 7t l.. Fos \1 rno ~..~- from the goltl mine at " Vi<'jo Rt·.d :" Dcndri c infiltr.1tion · of xic]c of iron. IS /N J;:(} == KE ... |