## 4 Results and Discussion
### Geoelectrical Section Analysis  
Geoelectrical sections (GSs) yield the visualization of lateral and vertical variations of resistive and conductive horizons, as well as possible electrical discontinuities. Based on the correlation between the interpreted and inverted VES patterns, seven GSs were performed along the N-S, NW-SE and E-W directions.  
It should be noted that due to the sometimes-large distance between electrical soundings in the same profile, correlations may be influenced by the presence of structural discontinuities, such as faults and fractures, making it difficult to correlate, which requires calibration with existing borehole data.  
Only the four most representative cuts of these directions are presented and discussed in this work, namely GS1 (Profile 1), GS2 (Profile 3), GS3 (Profile 5) and GS4 (Profile 7). Figures 6-9 show these geoelectrical cross-sections and for each one, a simplified cross-section has been drawn with the same horizontal and vertical scale.  
Section GS1, grouping the VES of profile 1 (Figure 6), shows the gradual plunge of the marl-limestone bedrock towards the north and, consequently, an increase in the thickness of the basaltic flow from the south to the north. The presence of the North Middle Atlas accident (NMAA) and the corresponding satellite faults to the south of the profile is a physical argument that justifies the electrical discontinuities between holes 1P1 and 2P1 and between holes 2P1 and 3P1. It is highly likely that because of the faulting in this corridor, the marl and limestone bedrock revealed by boreholes 1P1 and 2P1 may have arisen. The rising bedrock prevented the basaltic flow from flowing southwards. Section GS1 has been correlated with data from borehole NIRE 254/30.  
Section GS2 (Figure 7) groups the electrical soundings carried out in profile 3. It shows a gradual sinking of the marl and limestone bedrock towards the south, unlike the previous section, which generated a synclinal depression into which the basalts flowed with a thickness that increased from north to south. The existence of electrical discontinuities between boreholes 1P3 and 2P3 and between 2P3 and 3P3 corresponds to the continuity of NMAA satellite faults, leading to the uplift of the marl-limestone bedrock at the level of borehole 2P3, according to a horst structure, which prevented the flow of basaltic flows towards the south.  
Section GS3 (Figure 8) at the level of profile 5, shows that the top of the marl-limestone bedrock forms a bowl structure where boreholes 4P5 and 5P5 show the lowest points. Towards the two north-western and south-eastern extremities, a rise in the roof is observed, which implies a decrease in the thickness of the overlying basaltic flows. A geophysical discontinuity was recorded between electrical boreholes 5P5 and 6P5, which may represent a fault or a simple flexure of the bedrock.  
Figure 6: GS1 geoelectrical section of profile 1.  
Figure 7: GS2 geoelectrical section of profile 3.  
Figure 8: GS3 geoelectrical section of profile 5.  
Figure 9: GS4 geoelectrical section of profile 7.  
Section GS4 (Figure 9) is oriented E-W towards the north-eastern edge of the study area and follows profile 7. In this section, the thickness and extent of the basalts are clearly reduced. The maximum thickness reached by the basalts is 20 m, which was recorded in the middle of the section. Furthermore, a decrease in the thickness of these basalts is highlighted towards the west side where it reaches less than 5 m on the one hand. On the other hand, going towards the east end, this thickness progressively decreases until the bedrock outcrops.