Paper No. 132-2
Presentation Time: 1:50 PM
GEOLOGICAL MODEL OF THE EBERSWALDE DELTA (MARS)
PONDRELLI, Monica, Università d'Annunzio, IRSPS, viale Pindaro 42, Pescara, Pescara 65127, Italy, DI PIETRO, Ilaria, ASI, Rome, Italy, LE DEIT, Laetitia, LPG, Nantes Université, Université d'Angers, Le Mans Université, 2 chemin de la Houssinière, Nantes, 44322, France, MARINANGELI, Lucia, Dip. di Scienze Psicologiche, della Salute e del Territorio (DISPUTer), Universita' G. d'Annunzio, Via Vestini 31, Chieti, 66013, Italy, PANTALONI, Marco, Italian Institute for Environmental Protection and Research (ISPRA), via V. Brancati 48, Roma, 00144, Italy and ROSSI, Angelo Pio, Constructor University, Bremen, Germany
Geological mapping and representation of planetary surfaces have some intrinsic peculiarities and problems when compared to the same tools on Earth. Among the many (and body-specific) issues, the main ones are that the scales are instrument-dependent and the remote sensing approach can be rarely tied with groundtruth. In this framework, mapping sedimentary deposits on Mars is of particular importance to assess the geographical distribution of a unit and the vertical and lateral relations between the different units, which is the pre-requisite to address the issue of equifinality. The representation of the geological map in 3D (i.e., geological model) can improve the effectiveness of the map by emphasizing the geometric relations between the units.
The Eberswalde delta represents an ideal geological setting to test this approach and possibly propose an attempt of standardization for detailed (i.e., CTX to HiRISE scale) geological and geomorphological mapping of these deposits, because of its pristine morphologies, exposed stratigraphy, data quantity and quality, including compositional and topographic ones, described in several papers (e.g., Malin and Edgett, 2003; Pondrelli et al., 2008; Mangold et al., 2012; Poulet et al. 2014; Hughes et al, 2023).
The delta consists of light-toned layered deposits (LTDs) placed unconformably on top of a Noachian substratum and disconformably covered by recent cover units. The LTDs occur in correspondence of a distinctive morphological assemblage, including delta plain, delta front, and prodelta morphofacies, found in different deltaic lobes.
We present a 3D reconstruction of both the geology (focus in the LTDs) and geomorphology (focus on the morphofacies) of the delta, emphasizing the erosional surfaces that complicate its stratigraphic architecture.
References
Hughes et al., 2023 - JGR Planets, 128
Malin & Edgett, 2003 - Science, 302
Mangold et al., 2012 - Icarus, 220
Pondrelli et al., 2008 - Icarus, 197
Poulet et al., 2014 - Icarus, 231
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