整个水系向北排水，各个河道朝该方向分叉。
Drainage was to the north and individual channels bifurcate in that direction.
向河道方向，煤层分叉变薄，灰分高，向碎屑岩过渡。
Near the distributary channel, coal layer divarication and pinch-out, with high ash content, and transition to clastic rock.
河道在这里分叉。
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