Table 1.

Experimental conditions

Run	Starting material	Label	α	Temperature	Confining pressure	Max. differential stress	Bulk strain rate	Total strain	Total time	reaction progress
				°C	kbar	MPa	10− 6 s− 2	%	h
650	massive	N_nd_650_m	m	650	15	-	-	-	67 [-]	x
651	massive	N_d_620_m	m	620	15	720	1.35	7.2	41 [15]	x
653	foliated	Z_nd_650_45	45°	650	15	> 100*	-	-	24 [-]	xx
655	foliated	Z_d_620_45	45°	620	15	598	1.41	7.75	45 [15]	xx
678	foliated	Z_d_620_90	90°	620	15	370	1.46	8.3	38 [13]	xx
679	massive	N_nd_650_m-KI	m	650	15	-	-	-	63 [-]	-
680	foliated	Z_d_620_00	0°	620	15	549	1.38	7.1	35 [14]	x
681	foliated	Z_d_620_45-growth	45°	620	15	695	0.23	9.2	139 [108]	xx
682	foliated	Z_d_670_45-heating	45°	620–670	15	601	1.33	7.9	45 [16]	xx

Label refers to name of the sample as used in the text. It is composed of tags indicating the starting material as N = Norway (massive) and Z = Zermatt (foliated), axial compression (nd = no differential stress, d = differential stress), followed by the temperature, the orientation of the foliation (α), and additional information. α refers to the orientation of the macroscopic foliation with respect to the drill core axis, whereby m indicates massive serpentinite without foliation. Total time indicates the time at temperature, which includes equilibration and compression. The number in brackets is the time after reaching the hit point. Qualitative reaction progress estimated from dehydration band density is indicated as x = minor, xx = multiple through-going bands (cf. Supplementary material F). * high differential stress reached during incipient compression