由于受古地形及沉积物源的控制，砂体沿北东南西向呈条带状分布。
Controlled by paleotopography and sediment source, sand bodies had a banding distribution along the northeast-southwest direction.
要考虑的另一方面是沉积物源被移到别处之后被抛弃的三角洲朵体的命运。
Another aspect to consider is the fate of an abandoned delta lobe after the sediment supply had moved elsewhere.
中生代沉积物源主要来自北部的中央隆起带，次为东部高地及西部隆起区；
The Mesozoic provenance was mainly the central uplift belt in the north, and secondly the highland in the east and uplift region in the west.
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