Table 1 Samples used for SEM-CL investigation of sedimentary organic matter and supporting data.

Sample ID	Formation	U	Th	α dose	TOC	S1	S2	S3	T_max	HI	OI	PI	BR_o	s.d	No
Sample ID	Formation	ppm	ppm	no./mg	wt.%	mg/g	mg/g	mg/g	°C	HI	OI	PI	%	s.d	No
K-2	Salt Range	34.5	3.7	6.43*10¹⁶	36.72	10.15	220.67	2.78	430	601	8	0.04	0.34	0.07	39
Calumet Collier 34–5 13,574'	Sunniland	nd	nd	nd	25.07	8.79	113.64	2.17	423	453	9	0.07	0.36	0.05	52
APM	Green River	5.8	4.9	9.28*10¹⁴	22.37	2.50	195.00	3.90	439	871	17	0.01	0.33	0.03	100
KC-1	Kimmeridge	10.5	5.1	5.36*10¹⁵	44.10	7.63	325.06	8.04	409	737	18	0.02	0.29	0.03	13
Alum 1	Alum	14.9	8.5	2.43*10¹⁶	9.06	3.46	37.90	1.18	419	419	13	0.08	0.32	0.03	nd
POI-012b	Huron	15.4	11	1.89*10¹⁶	7.10	0.99	20.54	0.60	435	289	8	0.05	0.87*	0.08	51
EF50	Eagle Ford	3.9	1.7	1.20*10¹⁵	2.20	1.70	5.60	0.20	448	242	10	0.23	0.73	0.08	25
SN-5(b)	Salt Range	39.7	1.8	7.40*10¹⁶	27.58	8.29	133.39	2.79	431	484	10	0.06	0.49	0.04	49
XML001	Xiamaling	9.8	8	5.12*10¹⁶	5.75	0.53	28.99	0.43	438	457	7	0.02	0.34	0.03	25
GRNT 79–5 237.70–237.85 m	Barney Creek	4.4	11.3	2.80*10¹⁶	3.00	0.77	12.42	0.29	441	415	10	0.06	0.35	0.08	26
20,844 10,260.6'	Bakken	96.5	4.8	1.18*10¹⁷	13.69	3.55	52.18	0.31	441	381	2	0.06	0.78	0.11	100

U, uranium; Th, thorium; ppm, parts-per-million; α dose in number (no.) decay events per mg⁴²; TOC, total organic carbon in wt.%; S1 (thermal distallate), S2 (pyrolyzate) in mg hydocarbons (HC)/g rock; S3 in mg CO₂/g rock; T_max in °C; HI, hydrogen index in mg HC/g TOC; OI, oxygen index in mg CO₂/g TOC; PI, production index [S1/(S1 + S2)]; BR_o, solid bitumen mean random reflectance in %; s.d., standard deviation of BR_o; no., number of BR_o measurements; nd, no data. *Previously reported as 0.80% group mean in Hackley and Ryder⁵⁰, this is a newly reported individual measurement.

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