Page:Quarterly Journal of the Geological Society of London, vol. 28.djvu/39

 Quartz-crystals, fresh, probably from a geode.

Agate, various, predominating largely ; angular, subangular, and rounded : many pebbles glazed.

No. 12. From Diamondia. See page 9.

Washed, coarse, agate gravel*, containing: —

Rather large pebbles of various Jaspers (red &c.), some glazed.

A subangular water-worn fragment of Crocidolite-rock (the Crocidolite, altered to fibrous quartz, interlaminated with dense siliceous bands).

Small subangular fragments of Sandstone.

Quartz crystals, both fresh and rounded.

One pebble of Agate-breccia.

Agate, very various and abundant ; subangular and rounded ; rather large ; some pebbles highly glazed.

Nos. 13, 14, 15. From Du, Toits Pan. See page 11.

1. Not washed. A small quantity of drab- coloured, calcareous, earthy, coarse sand.

2. Washed graved (from a " cradle " after sifting†), white and black, containing: —

Calcareous tufa and Calcite, very abundant ; subangular and rounded : supplying the largest lumps (not larger than walnuts) in the gravel, every thing else being of much smaller size.

Zeolite ; angular fragments, rare.

Felspar (Orthoclase and Albite ?) ; angular fragments, few.

Magnesian Mica, somewhat decomposed; flakes, preserving more or less of the crystal form, not rare.

Steatite ; pilular, in small concretionary globules ‡ ; common.

Soapstone ; three angular pieces.

Chlorite (Clinochlore) schist § ; one fresh fragment.

Fibrous Talc-rock § (altered Anthophyllite ?) ; lustrous, bronze- yellow ; three subangular pieces.

Green Actinolite-schist§ ; three subangular pieces.

Dark-grey soapy shale ; three freshly broken pieces.

Magnetite ; some small subangular fragments.

Ilmenite§, very abundant; fresh-broken, subangular, and rounded.

Garnet, including Pyrope and Cinnamon-stone, very abundant; fresh and subangular.

Diopside (including Smaragdite (?) and Enstatite), abundant; fresh and subangular. Also Olivine (?).

Natrolite, broken prismatic crystals ; not rare.


 * A few fragments of Garnet, fresh and subangular, came with this parcel.

† A 39-carat diamond was found among this lot before it was sent.

‡ Prof. Tennant has received from Du Toit's Pan a small slab of greenish steatitic rock, composed of similar globules in a green matrix — also some Tourmaline and Zircon (rare), with decomposed felspathic, talcose, and micaceous rocks.

§ Bearing evidence of the presence of metamorphic rocks,

c2