THE VOLCANOES AND ROCKS OF PANTELLERIA 703 
ANALYSES OF AEGIRITE PANTELLERITE 
(SANTELMAL GRORUDOSE) 
A B C D E F Aa Ba Ca 
SiO wares sates: 7°.14 |69.79 |67.32 |70.30 |67.48 |68.11 |1.169 |1.163 | 1.122 
i O)NG ere eee ae S05 EDO | O. 55 | 6:32" |g. 70) Sen || 084 | 117 .094 
8) s.e:ao eee oe GEOT a +5 235 .|O073) O23 07-42 lt Sa2gulossull oad 042 
GON ad aomeeeee oe DV || wsckgy || Sethe || storey || Beear | anes || seas || gone OIL 
IIS @ Beste aiicne tet fers Onz0 || 0.25°|O. 207 |, 0.80) | 0277 0.47 | 005 ||| 2000 005 
(CEO) ots Seeker 0.45 | 0.25 | 0.20 | 0.84 | 1.45 | 0.14 | .088 | .004 004 
INIZA Disccrcsceaeeeeees SAA SOO Sa7 il We77O" ie Wi Ons2 .OSSil) oom 092 
KE ORF race ae 4.20 | 4.59 | 4.48 | 2.50 |] 2.94 | 1.60 | .045 | .049 .048 
136 ( 0) Sera eis nee OQ.25 || Ooi || Sug |) Oss || ©.oy || w.He8 lb eee tee 
JEL k0)\=—Shetiee Meena ONL 7a 0204" )|sOn4o))|( neds ends aie eh ner ip 
NO) Rs i ep eee erate ©2806) | O.899 0-50) | med. ||| midi) 1423) ||) on oll 007 
THROWS Ss aipieag Geren O.14 Sere Sark Mae adie Tae se yee 
Oren ties chante. Onl2s| Onl 3t|O208) len det|| nid. n.d oor | .oor OO 
SOW rian k ov. OROORs he aor | eesti let oie ae 
IMITIO Re aA cee es OLA O29) | Goazb | sme || sel, || Cl= 
; ©.70s| .005 003 003 
13210) > is cree eaeneee none CH, = 
0.66 iar 
99.86 |100.66/99.55 100.00 100.14|99.20 
A. Monte Sant’ Elmo. H.S. Washington, analyst. 
B. Costa Zeneti. H.S. Washington, analyst. 
C. Pumice. Rione Buccarame. H.S. Washington, analyst. 
D. Khartibugal. H. Foerstner, analyst. Zeits. Kryst., VIII (1884-), 173. 
E. Monte Sant’ Elmo. H. Foerstner, analyst. Zeits. Kryst., VIII (1884-), 186. 
F. Pumice of Pantelleria. H. Abich, Vulk. Ersch., 1841, Taf. ITI. 
Aa. Mol numbers of A. Ba. Mol numbers of B. Ca. Mol numbers of C. 
The norms of the first three rocks are as follows: 
A B (e 
Qa ces oe ots Oe le aaa eee 27.60 OTe 7 22.44 
OP. ac dol ogee eee oe ee ee 25.02 27.24 20.69 
IND MER Ia: bine obtrlose eas 20.44 35.63 24.10 
ING 5 3 c'o-6 0/6 0 0 es REE Re re ee 17.50 10.63 19.40 
INS; otro. 83 OS eee ey oe ©.49 
1D 66 Ao o A bee Lio oe eee Teo Soe 
IBIN? 5-6, aud 6 eI ee 4.10 0.60 1.03 
IME Sct: es ct OEE Ee ee een oe 2.09 Boe 
TUN og Sao S CRIs nana aca eee A077 1.67 1.42 
Blin 643-67 Unesco nee ee eee ee: 0.32 56 ofc 
JAN Dio’ 3. Gt0 iota CE ae ae ee 0.34 0.34 0.34 
99.28 100.30 95.91 
RGSS 3 sd 0.72 0.21 3-64 
100.00 100.51 99-55 
The Sant’ Elmo pantellerite, therefore, falls in varingose, 
II.3(4).1.3, owing to the large excess of silica, but transitional to 
