Assertion: alluvial fan's area | /r/CapableOf | lack sufficient cohesive material
Facets:
value: to stabilize channel banks
type: PURPOSE
Source sentences:
text: Networks of broad channel fills imply regular hydrologic activity over low slopes ( Table 2 ), but lack of meandering fluvial deposits suggests that these northwest areas lacked sufficient cohesive material to stabilize channel banks and maintain meander dynamics.