国立情報学研究所 - ディジタル・シルクロード・プロジェクト
『東洋文庫所蔵』貴重書デジタルアーカイブ

127. Sand from Camp ccxl a, NE. of Chainut-kol
(29. D 4).
Fine light grey powder with grains less than ·2 mm., and
with irregular aggregates up to 10 mm. long and gypsum
crystals.
The gypsum crystals contain so much of the powder as
to be quite opaque, and the aggregates consist of the powder
cemented by gypsum. Of the heavy minerals, biotite and
green amphibole are abundant and apatite is common.

128. Sand, thirteen miles SW. of Camp
ccxxxviii a, E. of Āltmish-bulak (32. B 3).
Fine light grey powder, less than ·2 mm. in diameter, with
aggregates and gypsum concretions up to 5 mm. and well-
rounded grains up to 3 mm.
The aggregates consist of grains of the powder cemented
by gypsum. The large grains include turbid felspar, and
quartz with many composite grains. Colourless and green
amphiboles are abundant. Of the heavy minerals, biotite and
muscovite are common. Gypsum is very abundant in the
fine powder, and there is some salt.

129. Soil with gypsum and 'shōr', eight miles SE.
of Camp ciii, Lop Desert (32. B 3).
Fine light grey powder less than ·2 mm., with aggregates
up to 10 mm., corroded gypsum crystals up to 30 mm. long,
and well-rounded grains from ·5 mm. to 5 mm. in diameter.
The powder contains a little calcium carbonate, abundant
gypsum, and some salt, and green amphibole is abundant in
the heavy crop.
There is quartz, in addition to composite grains, among
the large grains.

130. Drift-sand on Sai of Kuruk-tāgh, 12½ miles
E. of Camp ciii, Lop Desert (32. C 3).
Coarse, multicoloured sand, with many well-rounded
grains, ranging from ·7 mm. to 2 mm., very few grains less
than ·7 mm. in diameter, and irregular gypsum concretions
up to 5 mm.
There are no simple heavy minerals; most of the grains
are fine grained and indeterminate, but there is a good
deal of quartz, with some red felspar and fine-grained
quartzite.

131. Coarse sand from eroded Nullah, three miles
SSE. of Camp civ, Lop Desert (32. C 3).
Well-rounded, multicoloured sand, with grains ranging
from 1 mm. to 4 mm. in diameter. Coloured grains are
more numerous than colourless. The most abundant type
is a fine-grained dark grey or purple grit. Quartz, quartzite,
and gypsum concretions are common.

132. Coarse sand from vegetation belt, five miles
NNE. of Yantak-kuduk (35. A 4).
Coarse, multicoloured sand, with the smaller grains well
rounded and the larger generally subangular.
·7 mm. ·7-5 mm.
Mechanical analysis : 2 % 98 %
The smaller grains are mainly composite, but there is
some quartz, turbid felspar, and calcite. The larger grains
are very varied, and include red granite (with turbid felspar),
light green amphibole schist, fine-grained white limestone,
fine-grained quartz and felspar rock, red and purple fine-
grained rock containing much felspar (R.I. < 1·536).

133. Sand from ridge of dunes, 25′–30′, crossing
terminal basin of Su-lo-ho, five miles from Camp
cxii (35. C 4).
Well-rounded, multicoloured sand, ranging up to 1·5 mm.
< ·2 mm. ·2—·4 mm. ·4—·7 mm. > ·7 mm.
Mechanical analysis : 1 % 7 % 39 % 53 %
Composite grains predominate. In the heavy crop pink
garnet is abundant, and hypersthene, epidote, and green
amphibole are common.

134. Sand from hillock, 8′, in terminal basin of
Su-lo-ho, nine miles E. of Bēsh-toghrak (35. B 4).
Well-rounded, multicoloured sand, ranging up to 2 mm.
< ·2 mm. ·2—·4 mm. ·4—·7 mm. > ·7 mm.
Mechanical analysis : 13 % 20 % 45 % 22 %
Composite grains are predominant and simple heavy
minerals are scarce, but there are a few grains of green
amphibole. Felspars are abundant.

135. Sand from moist lagoon bottom of Su-lo-ho
terminal basin, seven miles E. of Bēsh-toghrak
(35. B 3).
Well-rounded, light brown sand, with many coloured
grains.
< ·2 mm. ·2—·4 mm. ·4—·7 mm. > ·7 mm.
Mechanical analysis : 13 % 40 % 42 % 5 %
Light-coloured opaque grains form the bulk of the heavy
crop, but green amphibole, magnetite, and garnet are
common.

136. Coarse gravel and sand overlying clay at
foot of Sai, near N. edge of Mesa area, terminal
basin of Su-lo-ho, fifteen miles E. of Bēsh-toghrak
(35. C 4).
Well-rounded, multicoloured sand, ranging up to 2 mm.,
with a large number of subangular pebbles ranging from
5 mm. to 15 mm.
·2—·4 mm. ·4—·7 mm. ·7-2 mm.
Mechanical analysis : 12 % 36 % 52 %
There are no simple mineral grains in the heavy crop.
The pebbles include pink granite with turbid felspar, fine-
grained brown grit, fine-grained light green amphibole +
felspar rock, and rhyolite showing granophyric structure.

137. Sandy stratum in clay ridge, 100′, fourteen
miles E. of Bēsh-toghrak (35. C 4).
Well-rounded sand with a good deal of light brown mud,
which coats the grains and sometimes binds them into loosely
cohering aggregates. The grains range in size between
·7 mm. and 3 mm., the bulk being from 1 mm. to 1·5 mm. in
diameter.
The only simple mineral grains seen in the sand are quartz,
felspar, and garnet; in the mud, quartz, felspar, mica, and
calcite were identified.