| They are chiefly leucite and nepheline rocks, such as leucitite, leucitophyre and nephelinite, but basalt and trachyte also occur. |
| Some of these are composed of trachyte, others of compact blue basalt with olivine. |
| Pumice and trachyte are the most common rocks around this mountain, and these are augitic or porphyroid. |
| South of the city of Isparta pyroclastic rocks are interbedded with rhyolite, trachyte, phonolite and lamproite flows. |
| Upon this rests a pumiceous breccia and conglomerate, with angular masses of trachyte, and some quartz pebbles. |
| To the north-east, on the boundary of the Langholm and Jedburgh sheets, the upper part of a small stream runs along the line of the shatter belt and a trachyte dyke. |
