Table 1.

Summary of key statistics for different parameters of all interpreted ploughmarks on the mid-Norwegian margin, including length, orientation, keel depth below the seafloor, keel incision depth, width, and width/depth ratio summarized for each palaeo-surface.

Surface name		SF	T1	T0	S2	S1	S0	U5	U4	U3	U2	U1	U0	A4	A3	A2	A1	A0	N9	N8	N7	N6	N5	N4	N3	N2	N1	N0	Total
Number of pm		1799	1081	1269	0	0	658	63	78	73	113	24	221	67	457	93	501	513	0	120	124	7	30	27	79	34	81		7512
Length	Mean	3310	3354	2848	–	–	2687	2537	2801	3365	3236	2531	3178	2452	2807	2966	2926	3139	–	2034	2136	2158	1738	1343	1946	1656	2035	–	2573
	Median	2753	2614	2162	–	–	1962	2217	2189	2733	2481	2096	2592	1953	2262	2187	2351	2421	–	1540	1801	1769	1594	1233	1541	1399	1365	–	2053
	Min	370	539	24	–	–	415	570	327	302	213	645	126	675	386	506	70	256	–	304	462	882	417	673	436	391	297	–	404
	Max	26,596	22,602	22,767	–	–	14,550	9856	14,650	10,312	13,735	7002	20,911	7774	13,420	15,078	14,944	28,178	–	10,177	7834	3398	4949	2494	9990	5938	16,735	–	13,213
	SD	2296	2536	2405	–	–	2244	1623	2374	2309	2210	1548	2434	1585	1882	2719	2087	2636	–	1464	1392	1042	1024	548	1489	1185	2104	–	1876
	Mean	56	70	63	–	–	66	63	74	62	64	79	56	60	63	64	54	61	–	42	49	44	52	51	53	57	65	–	59
	Median	49	59	57	–	–	53	57	65	58	54	83	51	55	54	63	41	49	–	41	48	40	51	52	50	57	63	–	54
Orientation	Min	0	0	0	–	–	0	0	2	16	0	27	1	13	0	4	0	0	–	0	0	21	14	23	13	19	4	–	7
	Max	180	180	180	–	–	180	177	177	167	176	157	173	167	178	177	179	180	–	179	179	72	96	76	163	90	178	–	159
	SD	36	48	38	–	–	50	46	41	30	41	34	31	26	44	32	43	45	–	28	29	18	19	18	23	16	30	–	33
	RANGE	15	15	21	–	–	17	18	25	27	30	24	20	18	16	22	25	30	–	15	23	27	18	17	25	30	21	–	22
Ploughed surface depth	MEAN	424	633	852	–	–	640	1375	1261	1054	1011	973	722	843	752	991	859	1068	–	740	882	809	645	669	666	823	649	–	841
	STD	4	4	5	–	–	4	5	7	7	8	7	5	4	4	6	6	8	–	4	6	6	4	4	7	8	5	–	6
	Mean	4	4	6	–	–	5	3	4	4	5	4	3	4		3	5	5	–	5	5	6	6	5	6	6	5	–	5
	Median	4	3	5	–	–	5	3	4	4	4	3	3	4		3	5	5	–	5	4	8	5	5	5	6	4	–	4
Keel depth	Min	1	1	1	–	–	1	1	1	1	1	1	1	1		1	1	1	–	1	2	2	1	2	1	1	1	–	1
	Max	14	22	31	–	–	12	10	15	9	17	12	14	9		12	18	30	–	13	12	12	12	13	13	13	17	–	15
	SD	2	3	5	–	–	3	2	3	2	3	3	2	2		2	3	4	–	2	2	4	3	3	3	3	3	–	3
	Mean	210	198	194	–	–	197	208	228	219	250	245	235	157		165	165	226	–	172	206	146	145	157	173	205	171	–	194
	Median	200	175	175	–	–	175	200	200	200	250	225	250	150		150	150	200	–	175	200	150	150	150	175	200	150	–	184
Keel width	Min	100	100	50	–	–	100	50	100	100	100	100	100	75		75	75	100	–	100	150	75	75	75	75	100	100	–	90
	Max	400	600	700	–	–	475	400	450	350	600	450	400	325		325	425	450	–	275	400	200	250	250	300	300	425	–	398
	SD	71	73	48	–	–	51	82	69	73	71	87	93	47		63	38	54	–	44	55	31	33	39	45	46	50	–	57
	Mean	50	60	36	–	–	43	67	50	63	57	80	75	42		50	33	45	–	37	50	23	25	31	32	39	38	–	47
	Median	12	17	8	–	–	11	31	20	17	23	21	25	20		19	7	13	–	14	18	13	15	14	12	15	13	–	16
Keel width/depth	Min	400	350	300	–	–	250	200	200	200	400	200	300	117		200	250	200	–	125	133	57	100	100	200	133	200	–	210
	Max	53	54	38	–	–	36	47	47	38	53	40	56	23		34	25	32	–	21	25	17	21	24	36	28	36	–	36
	SD	53	54	38	–	–	36	47	57	38	53	40	56	23		34	25	32	–		25	17	21	24	36	28	36	–	37