Original data for Kito et al.

This is the original dataset for Kito et al. in submitted. The dataset contains two types of primary data generated for the study: (1) timelapse videos of tank experiments, and (2) crater counting file used for estimating crater age.<b>1.</b><b> </b><b>Timelapse video (.mp4):</b>Timelapse videos record delta topography changes at regular intervals throughout the entire experiment (Run1-12).<b>Data Fields:</b> Three vertical laser planes (spaced at 25.0 cm intervals) and 23 horizontal laser planes (spaced at 1.0 cm intervals, starting at a height of 2 cm from the basement were continuously projected onto the experimental area.<b>Data Collection Methods: </b>Overhead photographs were automatically taken at regular intervals (15 s) during each experiment (Run 1-12).<b>Format: </b>MP4, compatible with standard media players.<br><b>2.</b><b> </b><b>Crater Counting File (.scc; .diam):</b>We used the crater size-frequency distribution to estimate the age (CSFDs).<b>Data Fields: </b>Latitude, Longitude: 0-360 degrees.<b>Data Collection Methods:</b> We identified craters with a diameter exceeding 100 m (avoiding secondaries) on the delta surface using a CTX image and counted them by Map projection independent Crater Tools on ArcGIS. Counted craters were analyzed by Craterstats II software, using crater production function (PF) and chronology function (CF) to derive the surface age. However, the surface area of each Martian stepped delta, and the number of craters was not enough to estimate the age. To facilitate analysis, some stepped deltas were grouped based on spatial and geomorphic similarity. Each group consists of deltas that meet the following criteria: latitude and longitude differences of ≤ 20°, and elevation differences of ≤ 500 m (<b>Fig. S7; Table S2</b>).<b>Format: </b>SCC or DIAM, compatible with Craterstats II software.<b>Usage Notes:</b>l Coordinate System: GCS_Mars_2000_Sphere.l Epochs: Mars, Michael (2013)l Production function (PF): Mars, Hartmann &amp; Daubar (2016)l Chronology function (CF): Mars, Hartmann (2005) [Michael (2013)]