The lithology of the Laoling formation ([Pt.sub.1]z) is dolomitic marble, with an average thickness of 467 m, the lithology of the Changbai formation ([T.sub.3]c) is rhyolite and rhyolitic pyroclastic rocks and the average thickness is 1300 m, the lithology of the Junjianshan formation ([Q.sub.1]pj) is basalt and olivine basalt and the average thickness is 189 m, the lithology of the Baitoushan formation ([Q.sub.2]b) is
trachyte and tuffaceous
trachyte and the average thickness is about 130 m, and the lithology of the Bingchang formation ([Q.sub.4]bc) is alkaline pumice and the average thickness is about 51.5 m (Figure 1).
Trachyphonolites and
trachytes are porphyritic to aphyric.
Granite, basalt, andesite and
trachyte are used as coating materials for buildings.
Even with similar Si[O.sub.2] contents, the syenitic suite has higher Nb/Y than the granitic suite, and the samples plot in the alkalic fields as the intrusive equivalents of volcanic rocks such as
trachyte and alkali rhyolite.
The geology of the Texas Davis Mountains AVA is dominated by a large area of older volcanic rocks (rhyolite,
trachyte, lava flows) at lower elevations in the north and east, and younger volcanic rocks (
trachyte, rhyolite, tuff, latite) at the higher elevations in the central and southwest areas, including Mount Livermore, Black Mountain and surrounding peaks (Fig.
Given the sparsity of evidence, it is not surprising that the so-called constitution stone of Chios has caused so much controversy about its dating, the order of its sides, the quality of its democracy and whether or not the stone really comes from Chios: Meiggs and Lewis (1988: 17) mention that the red
trachyte stone on which the constitution is inscribed is not common on Chios but that it is plentiful in nearby Erythrae.
The gray lamprophyric rock is rich in phenocrysts and igneous xenoliths, and appears to have a composition similar to that of a
trachyte. These igneous rocks are connected to a significant mass of lamprophyric rocks (not shown on the above-mentioned geologic map) which border the garnet deposit to the north and to the west.
While this service offers the most direct route through Venice and wonderful views of the city, you have to accept the boat's lurching motion and industrial-level shudders as part of the fun Joining the crowds at the city's main harbour, we bounced our wheelie suitcases over the
trachyte and sandstone pavements, passing naff restaurants and tacky carnival masks as we passed through the world's most famous piazza - St Mark's Square.
While this service offers the most direct route through Venice and wonderful views of the city, you have to accept the boat's lurching motion and industrial-level shudders as part of the fun Joining the crowds at the city's main harbour, we bounced our suitcases over the
trachyte and sandstone pavements, passing naff restaurants, lanky teenagers and tacky carnival masks as we walked through the world's most famous piazza - St Mark's Square.
Most of the tools were made from
trachyte, a rock with a much smoother surface than that of other rock types available at Gona.