- downtonian stage
- 当顿阶
English-Chinese geology dictionary (英汉地质大词典). 2013.
downtonian stage
Look at other dictionaries:
Devonian — For the Celtic language, see Southwestern Brythonic language; for the residents of the English county, see Devon. Devonian Period 416–359.2 million years ago … Wikipedia
Old Red Sandstone — Stratigraphic range: Late Silurian to earliest Carboniferous Cross section showing quartz and chert pebbles in a sample from central England (scale bar is 10 mm). Type Geological formation … Wikipedia
