4. Results
4.1. Field observations
The Oman Mountains from the eastern Batinah Coastal Plain to the Sur area (Fig. 1), encompass several Eocene to Miocene NW-striking sinistral transtensional and tranpressional faults, including (1) the “Tertiary Ridge” of Al-Khod Village (Scharf et al., 2016), (2) the Sunub Fault Zone (Mattern et al., 2018c), (3) the Wadi Mansah Fault Zone (Bailey et al., 2019; Scharf et al., 2019a), (4) the Issmaiya Fault Zone (Callegari et al., 2020), (5) the Ja’alan Fault (Filbrandt et al., 1990; Rogers et al., 1991), and (6) the Coastal Parallel Shear Zone (Wyns et al., 1992; Moraetis et al., 2018).
Eleven field sites in the Muscat-Seeb area were investigated, exhibiting ~N/S-striking compressional features and/or NW-striking sinistral faults (Figs. 2 and 3). Sites 1, 2, 3, 6, 10 and 11 are within and sites 4, 5, 7, 8 and 9 are outside the Rusayl Embayment (Fig. 3). Two NW-striking sinistral faults and one N-striking fold were studied at and near the Salma Plateau (Fig. 2; site 12-14). A NW strike-slip fault, E/W normal fault, N/S folds and thrusts were investigated in the Ibra Basin (site 15). The structures and their locations are shown in figures 1-3 and summarized in tables 2 and S1. Detailed outcrop descriptions are documented in the Supplementary Material (S2).
Table 2. Summary of field observations. More field details are presented in Table S1 and section S2. Sites are depicted in the Figures 2 and 3 and listed from the NW to the SE.