Interpretation

Multilayered thin sandstone within this facies association developed by the channel burst in the effect of flood, identified as the crevasse splay (Figure 5J). The ORCs are derived from the organic sediments at the channel bank or the initial area in which flood flow through (Figure 5D–F). The scouring of a high-density flood, which has a fast flow rate and high energy, is the main reason for the organic-rich sediments turn into ORC in the special sedimentary environment. Due to the strong agitation of high-energy flood, ORC has a high degree of fragmentation and low structural maturity, rarely resulting in large blocks. The energy of flood decreases rapidly as a result of uncontained condition so that the ORC is deposited along with the sandy sediments after short-distance transportation. After the waters receded, the small ORC under the buoyant handling deposit as the thin layers.

#### *4.3. Facies Association III*
