Data Set for: "Amphibole-mineral reorientation leads to progressive detachment-fault weakening along slow-spreading mid-ocean ridges"

Data set for the 42 core friction experiments performed for gouge samples (altered basaltic rocks) from Iceland (wells from Krafla and Reykjanes) used in the manuscript, "Amphibole-mineral reorientation leads to progressive detachment-fault weakening along slow-spreading mid-ocean ridges". All samples are tested in wet and dry conditions at 10, 30, and 50 MPa with velocity steps and slide-hold-slides. The data were collected from experiments performed with exactly the same protocol (same run in, same initial gouge thickness, same velocity steps, same hold periods), in the same machine, by the same operator (or by an operator who was trained and supervised by the original operator).