bouma cycle वाक्य

उदाहरण वाक्य

1. It is unusual to see all of a complete Bouma cycle, as successive turbidity currents may erode the unconsolidated upper sequences.
2. Bouma cycles begin with an erosional contact of a coarse lower bed of pebble to granule conglomerate in a sandy matrix, and grade up through coarse then medium plane parallel sandstone; through cross-bedded sandstone; rippled cross-bedded sand / silty sand, and finally laminar siltstone and shale.