1.   It therefore follows that all sedimentary bodies, other than deep sea oozes and volcanic ash deposits, are likely to be diachronous.

2.   Large areas of island are covered with thick deposits of black volcanic ash, known locally as picon.

3.   Much of the mountain consists of volcanic ash, long since hardened to jagged rock.

4.   Multicolored volcanic ash flows, long since hardened to jagged rock, reach into the sea like fantastic taffy mountains.

5.   The buried artifacts were found between layers of volcanic ash and other substances.

6.   The city was buried under several meters of volcanic ash, many of the inhabitants being asphyxiated in their houses.

7.   The finest fragments make volcanic ash and dust.

8.   The island became covered with vegetation, fossils of which are sometimes found in the volcanic ashes.

9.   The volcano spewed out more scorching volcanic ashes, gases and rocks.