DOI: 10.5281/zenodo.15088200
title: Supplementary material for Drainage divide migration along a passive margin escarpment: the Devonian Escarpment and the Paranapiacaba Range (Paraná, Brazil).

description: These are the supplementary files for the paper untitled "Drainage divide migration along a passive margin escarpment: the Devonian Escarpment and the Paranapiacaba Range (Paraná, Brazil)" submitted to "Quaternary Geochronology" for consideration for publication. The aim of the study is to provide a methodological framework to understand long-term landscape evolution in a tropical escarpment and to inform broader studies on passive margin geomorphology. This study examines drainage divide migration and its role in escarpment retreat along the Devonian Escarpment and Paranapiacaba Range in Paraná, Brazil. We employ a multi-method approach combining cosmogenic nuclide analyses (10Be and 26Al) to derive denudation rates, geomorphic indices, and morphometric analyses to quantify denudation asymmetries and assess divide mobility The Excel Spreadsheets provide Tables S1.1 to S1.7 as well as figures S1.1 to S1.16 and S2. The Pdf file provides information about the chemical procedures and Accelerator Mass Spectrometry. More precisely : • Table S1.1 presents the geomorphic characteristics of the studied watersheds extracted from the "Forest and Building removed Digital Elevation Model (FABDEM)" with 1 arc second (≈30 m) of horizontal resolution (Hawker et al., 2022). • Table S1.2 presents chemical parameters and Accelerator Mass Spectrometry results for in situ-produced 10Be obtained at Laboratoire National des Nucléides Cosmogéniques (LN2C, CEREGE, Aix-en-Provence, France), which hosts the French AMS Facility ASTER (Arnold et al., 2010). • Table S1.3 presents chemical parameters, ICP-OES and Accelerator Mass Spectrom- etry results for in situ-produced 26Al obtained at Laboratoire National des Nucléides Cosmogéniques (LN2C, CEREGE, Aix-en-Provence, France), which hosts the French AMS Facility ASTER (Arnold et al., 2010). • Table S1.4 presents the cosmogenic production parameters used to convert in situ produced cosmogenic 10Be and 26Al concentrations into denudation rates and other geormorphic parameters like apparent burial durations and pre-burial erosion rates using Blard et al. (2019b,a) and fluvial ratios using Halsted et al. (2024). • Table S1.5 presents the comparison of the basin-wide denudation rates calculated in this study using the secular equilibrium using Stone (2000)’s time independent and Lifton et al. (2014)’s time dependent scaling scheme, as well as "Riversand" Stübner et al. (2023) and CronusCalc (Balco et al., 2008b). Table S1.6 presents the geomorphic parameters used to derive drainage divide migra- tion rates using the approach by Zhou et al. (2022). The spreadsheet also includes figures S1-1 to S1-11, showing the maps of the different studied drainage divides. • Table S1.7 provides the average drainage migration rates by studied divide. • Figures S1-12 to S1-15 show the graphs of drainage mobility using the approach pro- vided by Forte and Whipple (2018), based on χ and Gilbert’s metrics. • Figure S2 shows a map locating occurrence of caves in the studied area (after de Sordi et al., 2022; Silveira and da Silveira, 2023).