This folder contains 9 grid files and four folders as described below. 

1. Grid files include the following: 
(1) arsrp_AGE.grd -- This shows age information (grid size: 400m; unit: m.y.) within the survey area.
(2) arsrp_bathy.grd -- This shows shipboard multibeam bathymetry (grid size: 100m; unit: m) within the survey area.
(3) arsrp_crust.grd -- This shows relative crustal thickness (grid size: 400m; unit: km; reference thickness = 6 km) within the survey area.
(4) arsrp_nonon-isostatic topography.grd -- This shows non-isostatic topography within the survey area (grid size: 400m; unit: m)
(5) arsrp_rmba.grd -- This shows residual mantle Bouguer anomaly (RMBA) within the survey area (grid size: 400m; unit: mGal)
(6) arsrp_Eflank_SSN.grd -- This shows north-looking side-scan sonar data for the east flank of the MAR within the survey area (grid size: ~20m).
(7) arsrp_Eflank_SSS.grd -- This shows south-looking side-scan sonar data for the east flank of the MAR within the survey area (grid size: ~20m).
(8) arsrp_Wflank_SSN.grd -- This shows north-looking side-scan sonar data for the west flank of the MAR within the survey area (grid size: ~20m).
(9) arsrp_Wflank_SSS.grd -- This shows south-looking side-scan sonar data for the west flank of the MAR within the survey area (grid size: ~20m).

2. Four folders include the following:

Folder (1): Movies.zip -- This folder contains two plate-reconstruction movies of non-isostatic topography and RMBA from Chron 8n to the present. West-flank data are held fixed.

Folder (2): NTD_traces.zip -- This folder contains the locations (longitude, latitude) of the axis of maximum depth (AMD) of all segment boundaries (i.e., traces of non-transform discontinuities, NTDs) within the study area. Segment names and flank information are reflected in file names, for example:

SegAE_Eflank_boundary.dat -- Indicates the NTD between segments A and E (SegAE) on the east flank (Eflank).

SegA_Eflank_south_boundary.dat -- Indicates the NTD at the southern boundary (south_boundary) of segment A (SegA) on the east flank (Eflank).

SegI_Eflank_north_boundary.dat -- Indicates the NTD at the northern boundary (north_boundary) of segment I (SegI) on the east flank (Eflank).

Folder (3): Magnetic_anomalies.zip -- This folder contains all isochrons (longitude, latitude) for conjugate flanks of the MAR within our survey area. Chron name and flank information are reflected in file names, for example:

allmag2anwnote.TXT – Indicates:
- all = all spreading segments
- mag = magnetic anomalies
- 2an = Chron 2an
- w = west flank of MAR
- note = notation of segment names

ridgenote.TXT -- Indicates locations of current spreading axis (ridge) with notation of segment names (note).

Folder (4): Data_calculation.zip -- This folder contains data calculation results for all NTDs and segments that are presented in the paper, including M and T extension factors, topography, RMBA, crustal thickness, segment length, age, etc. Segment names and ridge-flank information are reflected in file names, for example:

SegA_inward_Eflank_xyaztnrcf_allS_L0.040094W0.20047_100m_allslope_final.dat – Indicates data within 20-km wide boxes:
- SegA = Segment A
- inward = inward-facing slopes 
- Eflank = east flank of the MAR
- xyaztnrcf = columns 1 to 9 
- allS = all slope
- L0.040094 = 4-km box steps (in degree)
- W0.20047 = 20-km-wide box (in degree)
- 100m = multibeam bathymetry grid size
- allslope = all slope
- final = final results

There are 41 columns in the file:
	Column 1: Average longitude within the box (x, unit: degrees)
	Column 2: Average latitude within the box (y, unit: degrees) 
	Column 3: Average age within the box (a, unit: m.y.) 
	Column 4: Average seafloor depth within the box (z, unit: m) 
	Column 5: T extension factor within the box for slopes >5 degrees (t); 
	Column 6: Average non-isostatic topography depth within the box (n, unit: m) 
	Column 7: Average RMBA within the box (r, unit: mGal) 
	Column 8: Average crustal thickness within the box (c, unit: km) 
	Column 9: Average free-air gravity anomaly (FAA) within the box (f, unit: mGal) 
	Column 10: T extension factor within the box for slopes >10 degrees
	Column 11: T extension factor within the box for slopes >15 degrees
	Column 12: T extension factor within the box for slopes >20 degrees
	Column 13: T extension factor within the box for slopes >30 degrees
	Column 14: Minimum seafloor depth within the box (unit: m) 
	Column 15: Mode seafloor depth within the box 
	Column 16: Median seafloor depth within the box 
	Column 17: Maximum seafloor depth within the box 
	Column 18: Minimum non-isostatic topography depth within the box 
	Column 19: Mode non-isostatic topography depth within the box 
	Column 20: Median non-isostatic topography depth within the box 
	Column 21: Maximum non-isostatic topography depth within the box 
	Column 22: Minimum RMBA within the box (unit: mGal) 
	Column 23: Mode RMBA within the box (unit: mGal)
	Column 24: Median RMBA within the box (unit: mGal)
	Column 25: Maximum RMBA within the box (unit: mGal)
	Column 26: Minimum crustal thickness within the box relative to 6 km model crustal thickness (unit: km) 
	Column 27: Mode crustal thickness within the box relative to 6 km model crustal thickness (unit: km) 
	Column 28: Median crustal thickness within the box relative to 6 km model crustal thickness (unit: km) 
	Column 29: Maximum crustal thickness within the box relative to 6 km model crustal thickness (unit: km) 
	Column 30: Minimum FAA within the box (unit: mGal) 
	Column 31: Mode FAA within the box (unit: mGal) 
	Column 32: Median FAA within the box (unit: mGal) 
	Column 33: Maximum FAA within the box (unit: mGal) 
	Column 34: Minimum crustal age within the box (unit: m.y.) 
	Column 35: Mode crustal age within the box (unit: m.y.) 
	Column 36: Median crustal age within the box (unit: m.y.) 
	Column 37: Maximum crustal age within the box (unit: m.y.) 
	Column 38: The order of box counting from young to old crust 		
	Column 39: Average box length of the irregular limits (unit: km) 
	Column 40: Average segment length of the irregular limits (unit: km) 
	Column 41: Distance from segment center to flowline anchored at present intersection with ridge axis (unit: km)

SegA_Wflank_xyanSeglFL_L0.010023W0.050117_flowline_dis_final.dat – Indicates data within 5-km boxes:
- SegA = Segment A
- Wflank = west flank of the MAR
- xyanSeglFL = columns 1, 2, 3, 4, 8, 9
- L0.010023 = 1-km box steps (in degree)
- W0.050117= 5-km-wide box (in degree)
- flowline_dis = distance from segment center to discontinuity
- final = final results

There are 10 columns in the file:
	Column 1: Average longitude of box (x, unit: degrees) 
	Column 2: Average latitude of box (y, unit: degrees) 
	Column 3: Average crustal age of box (a, unit: m.y.) 
	Column 4: Average non-isostatic topography depth of box (n, unit: m); 
	Column 5: Box length of box (unit: km); 
	Column 6: Segment center longitude of box (degrees) 
	Column 7: Segment center latitude of box (degrees) 
	Column 8: Segment length of box (Segl, unit: km) 
	Column 9: Distance from segment center to flowline of box (unit: km)
	Column 10: The order of box counting from young to old crust.
DISC_AE_SegASegE_Eflank_dis2flowline_L0.010023W0.050117.dat – Indicates data within 5-km wide boxes:
- DISC_AE = NTD AE
- SegASegE = Segments A and E
- Eflank = east flank of the MAR
- dis2flowline = columns 6
- L0.010023 = 1-km box steps (in degree)
- W0.050117= 5-km-wide box (in degree)

There are 6 columns in the file:
	Column 1: Longitude of axis of maximum depth in NTD (unit: degrees)
	Column 2: Latitude of axis of maximum depth in NTD (unit: degrees) 
	Column 3: NTD age (unit: m.y.)
	Column 4: Flowline longitude at corresponding age (unit: degrees) 
	Column 5: Flowline latitude at corresponding age (unit: degrees) 
	Column 6: Distance from NTD to flowline anchored at intersection with present ridge axis (dis2flowline, unit: km)