PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
in Maine, and their mineral composition—Continued. 
181 
Structure. 
Gecloete 
As regards enee 
sae ees stratifica- | formation. Essential. 
cate tion. 
Coarse ...-..- Indistinetly | Archean..-.| Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
JOS Ce indistinctly |....do -....-- Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
Wines =.= 22% . Indistinctly |....do ......- Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
SE RRULO) ai ~ 2-5 - Indistinctly |....do ....... Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
Medium ..... Indistinetly |....do .....-.- Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
o_o Si Sao Indistinctly |....do ....-.- Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
not (ERE ee Indistinctly |....do ....... Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
BME ..-=-.=<; Indistinctly |.-..do .....-- Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
52880 Beecees Indistinctly |....do -...... Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
“eG Sees Indistinctly |....do ..-.... Quartz, orthoclase, plagio- 
laminated. close, hornblende, biotite. 
= a net foes Indistinctly |..-.do....... Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
oo Seti Ee Indistinctly |..-.do ..-....- Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
ees OO wiccosss « Indistinctly |....do ......- Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
23a eae Indistinctly |....do ......- Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
{BEG eee Laminated..|.... Oats Quartz, orthoclase, plagio- 
clase, muscovite, biotite. 
Coarse ....... Massive ...-]..-. dOnfes--c- Quartz, orthoclase, plagio- 
clase, biotite. 
BING /- ==. -- ==. indistinctly |....do....... Quartz, orthoclase, plagio- 
laminated. clase, muscovite, biotite. 
7c OR Beas indistinctly |... /do ....... Quartz, orthoclase, plagio- 
laminated. clase, muscovite, biotite. 
Medium ..... Massive ....}.--. Gerry ene Quartz, orthoclase, plagio- 
clase. 
Coarse ....... Indistinetly |..-.do .....-. Quartz, orthoclase, plagio- 
; laminated. clase, biotite. 
NG's sae. === Indistinctly |....do ....... Quartz, orthoclase, plagio- 
laminated. clase, biotite. 
2 tee Massive .-.-.|.... 1G canes Quartz, orthoclase, plagio- 
clase, muscovite, biotite. 
PEER AON sae |--35.0 Gh aseaeee| ae GY SACRE htc ono ee eS CEee Oh aan a 
_ COC gece Sha (0 eae eee Oe Ovens tad Peace nance Usage hae eee 
{op SS Indistinctly |....do ....... Quartz, orthoclase, plagio- 
; laminated. clase, biotite. 
Medium ..... Laminated..|.... Oyuseo- Quartz, orthoclase, plagio- 
clase, biotite. 
BUG ina ea= > = Massive ..--}.... Otsss. ene Quartz, orthoclase, plagio- 
clase, biotite. 
Seen Ol acwakias ccc: DOseewoce eo. 7 a jeeps Quartz, orthoclase, plagio- 
clase, biotite. 
OO ncn ss lavas dO -/eaeeee os do .......| Quartz, orthoclase, plagio- 
clase, biotite. 
OATES ...-25-|2.-. Coie uae ss Ot. cores Quartz, orthoclase, plagio- 
clase, biotite. 
Gh ea6 =a BEA: (Re Pa Gpoccnec: Quartz, orthoclase, plagio- 
Component minerals. 
| clase, biotite. 
eee eee 
Accessory and accidental. 
Hornblende, apatite, zircon, 
magnetite, sphene. 
Microcline, muscovite, apa- 
tite, magnetite, epidote. 
Microcline, muscovite, epi- 
dote, apatite, sphene, mag- 
netite. 
Microcline, muscovite, epi- 
dote, apatite, sphene, mag- 
netite. 
Hornblende, sphene, epi- 
dote, apatite, magnetite, 
pyrite. 
Hornblende, sphene, epi- 
dote, apatite, magnetite, 
pyrite. 
Hornblende, sphene, epi- 
dote, apatite, magnetite, 
pyrite. 
Muscovite, magnetite, apa- 
tite, rutile-like needles in 
quartz. 
Microcline, muscovite, mag- 
netite, apatite, rutile-like 
needles in quartz. 
Apatite, sphene,  epidote, 
magnetite, pyrite, calcite. 
Microcline, muscovite, mag- 
netite, apatite, rutile-like 
needles in quartz. 
Microcline, muscovite, mag- 
netite, apatite, rutile-like 
needles in quartz. 
Microcline, muscovite, mag- 
netite, apatite. 
Muscovite, apatite, zircon, 
sphene, magnetite, pyrite. 
Apatite, epidote, pyrite. 
Hornblende, apatite, zircon, 
magnetite, sphene. 
Microcline, apatite, garnets, 
very little magnetite, py- 
rite, rutile needles in 
quartz. 
Microcline, apatite, garnets, 
very little magnetite, py- 
rite, rutile needles in 
quartz. 
Hornblende, epidote, mag- 
netite, sphene. 
Microcline, muscovite, gar- 
net, apatite, magnetite. 
Microcline, garnet, rutile 
needles in quartz. 
Microcline, garnet, rutile 
needles in quartz. 
Microcline, garnet, rutile 
needles in quartz. 
Hornblende, apatite, sphene, 
magnetite 
Apatite, magnetite, zircon. 
Muscovite, »patite, magnet- 
ite. 
Muscovite, apatite, magnet- 
ite. 
Apatite, magnetite, pyrite. 
Do. 
Do. 
