D10 (μm)	D50 (μm)	D90 (μm)	Percent <4 μm	Percent <63 μm
Bed-material measurements (bedform scale)	Blackhawk Formation	5.6	128	277	8.6	28.4
	Castlegate Sandstone	36.5	170	299	5.6	14.1
Interbar-fine measurements (reach scale)	Blackhawk Formation	4.3	80	178	9.8	39.6
	Castlegate Sandstone	12.5	104	194	7.6	22.1
		Facies	Outcrop proportion	Percent < 63 μm	Percent > 63 μm
Outcrop-scale estimates	Blackhawk Formation	Channel	0.26	28.4	71.6
		Proximal overbank	0.34	40	60
		Distal overbank	0.39	60	5
		Bulk outcrop	1.00	58	42
	Castlegate Sandstone	Channel	0.94	14	86
		Proximal overbank	0.05	40	60
		Distal overbank	0.01	90	10
		Bulk outcrop	1.00	16	84