Figures & data
Figure 1. Northern Apennines. (a) Geological sketch map of Tuscany and (b) Schematic structural map of the area shown in a.
Figure 2. Stratigraphy of the study area alluvial deposits. (a) Pliocene continental deposits unconformably overlain by allounit V1, which shows three main fining upward (FU) intervals, the main unconformity is marked by a yellow line; (b) Fining-upward fluvial gravel of unit V2flb, unconformably overlaying Pliocene marine deposits; and (c) Sandy fluvial deposits of unit V2flb deposits, covered by palustrine V2pl facies and overlain Pliocene marine deposits.
Figure 3. Sedimentary facies of the study area deposits. (a) fluvial sand with subordinate silt of V1; (b) fluvial gravels with abundant sandy matrix (V1); (c) muddy floodplain deposits of V2fla; (d) fluvial, cross-stratified gravel of V2flb unit; (e) organic-rich deposits of V2pl palustrine deposits; and (f) alluvial-fan gravel of unit V2af.
Figure 4. Structural features of the normal fault crossing the study area paleovalley. (a) Fault plane in sandstone (Macigno Fm.) and related kinematic indicators consisting of superposed generations of calcite fibers; (b) Tectonic striations (red arrow) caused by intra-clast shearing induced by tectonic displacement; (c) Well-core data showing bedrock displacement affected by the fault in the Castello di Montalto area; and (d) Natural CO2 emissions along the Ambra Creek.
