Page:Quarterly Journal of the Geological Society of London, vol. 28.djvu/363

1872.] compact. From a microscopic examination, Mr. Allport gave the following description:—

"This is a felsite or trachyte, and consists of a fine, granular felspathic base, in which there are scattered groups of minute green grains and crystals of hornblende."

Post Pliocene: Alluvial Upper Gold Deposit.

Desert Sandstone.

Gold-workings.

Elvanite.

Metamorphic: Mica and Hornblende Slates.