## 3 Results
### Mineral Composition  
The different microfacies studied have different contents in carbonate mineral phases (calcite and dolomite) (Table 3) and generally show very low content in other types of minerals. Content > 5% in quartz or feldspar is rarely detected. The \"crackle\" breccia, which show a concentration of clasts of more than 75%, show the highest percentages in dolomite, in some cases close to totality. Mosaic and chaotic (rubble) breccia also have \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**BRECCIA TYPES**} \\ \hline \multicolumn{5}{c}{**Clast-Supported**} & \multicolumn{2}{c}{**Matrix-Supported**} & \multirow{2}{*}{**CONGLOME**} \\ \cline{2-2} \multicolumn{5}{c}{**CRACKLE**} & \multicolumn{2}{c}{**MOSAIC**} & \multicolumn{2}{c}{**RUBBLE**} \\ \hline
**CB** & **M** & **Mv** & **Mm** & **RB** \\ \hline \multicolumn{5}{c}{**Clast concentration (\%)**} & 70–95 & 55–70 & 50–70 & 60–75 & 40–55 & 40–60 \\ \hline \multicolumn{5}{c}{**Clast rotation (\({}^{\circ}\))**} & 0–10 & 10–25 & 15-25 & 10–20 & \textgreater{}25 & \textgreater{}25 \\ \hline \multicolumn{5}{c}{**Clast size (mm)**} & 5–400 & 2–200 & 2–150 & 2–250 & 2–250 & 4–200 \\ \hline \multicolumn{5}{c}{**\% matrix and/or cement**} & \textless{}5 & 15–35 & 15–40 & 10–25 & 40–75 & 25–50 \\ \hline \multicolumn{5}{c}{**Matrix/cement ratio**} & 0–5/95–100 & 25–40/60–75 & 20–30/70–80 & 15–25/75–85 & 45–75/25–55 & 50–70/30–50 \\ \hline \multicolumn{5}{c}{**Dolomite**} & \multicolumn{2}{c}{-} & - & - & - & - \\ \cline{2-7} \multicolumn{5}{c}{**Calcite**} & \multicolumn{2}{c}{-} & - & - & - & - \\ \cline{2-7} \multicolumn{5}{c}{**Clays**} & \multicolumn{2}{c}{-} & - & - & - & - \\ \hline \multirow{5}{*}{**Dolomite**} & \multicolumn{2}{c}{Dolomite**} & - & - & - & - & - \\ \cline{2-7}  & \multicolumn{2}{c}{White calcite} & - & - & - & - & - \\ \cline{2-7}  & \multicolumn{2}{c}{Reddish calcite} & \multicolumn{2}{c}{-} & - & - & & \\ \hline \multirow{5}{*}{**Dolomite**} & \multirow{5}{*}{**FUSEN**} & JUM & 5 & 8 & 3 & - & 4 & - \\ \cline{2-7}  & & FUEN & 5 & - & - & - & 4 & 2 \\ \cline{2-7}  & \multicolumn{2}{c}{JIM} & 8 & - & - & - & - & - \\ \cline{2-7}  & \multicolumn{2}{c}{FV} & 4 & 5 & - & - & 4 & - \\ \cline{2-7}  & \multicolumn{2}{c}{Y} & 5 & 7 & - & - & 4 & 3 \\ \cline{2-7}  & \multicolumn{2}{c}{SP} & 7 & - & 2 & 3 & 5 & - \\ \cline{2-7}  & \multicolumn{2}{c}{SC} & 20 & 9 & - & - & 8 & - \\ \hline \multirow{5}{*}{**Dote**} & \multirow{2}{*}{**FUSEN**} & EN & 6 & 5 & - & - & 5 & - \\ \cline{2-7}  & \multicolumn{2}{c}{FHI} & - & 6 & - & - & 3 & - \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Types and distribution of breccia facies in the study area. The number of collected samples for each breccia category in the studied sections is included. high contents of dolomite, but it must be taken into account that both matrix and cements, at least partially, may have a dolomitic composition. Given the low or no content in other mineral phases that are not calcite or dolomite, the calcite content of all breccia types is inversely proportional to the dolomite content, the matrix-supported types being the richest in calcite, reaching 45%. The analysed dolomites are not stoichiometric, and show an enrichment in Ca with % molCaCO\({}_{3}\) values ranging from 50.3 to 56.1 (62% of samples between 53 and 55% molCaCO\({}_{3}\)). No relation between the stoichiometry of the dolomites, the dolomite textural types or the breccia fabric has been recognised (Figure 6). Both the calcitic crystals associated with dolosparites, as well as those that make up venules and speleothems are LMC (<4% molMgOC\({}_{3}\)).