Dwyka tillite

例句：

1. 1. The geologist studied the Dwyka tillite to understand its age and composition.
   地质学家研究了Dwyka地层，以了解其年龄和组成。
2. 2. The ancient Dwyka tillite is a rich source of minerals that have been used for centuries.
   古代的Dwyka地层是数百年来一直被使用的矿物丰富的来源。
3. 3. The Dwyka tillite contains traces of organic material that indicate the presence of life in the past.
   Dwyka地层含有有机物质的痕迹，表明过去有生命的存在。