Profile P1 |
A2 |
Scarce: pyroxene, potassium feldspar and quartz. Frequent: plagioclase feldspars, ilmenite and magnetite |
Open porphyric |
Speckled with weak orientation; frequent |
Moderately developed angular and subangular blocks |
Planar void |
Very abundant typic and crescent coatings of clay, numerous clay + Fe coatings, occasional typic hypo-coatings of Fe covering external particle surface, numerous dense clay-Fe infilling, abundant typic and concentric nodules of Fe and occasional pseudomorphic nodules of feldspars, chalcedony and quartz, abundant papules |
Profile P2 |
BA |
Scarce: pyroxene, potassium feldspar and quartz Frequent: plagioclase feldspars, ilmenite and magnetite |
Double-spaced porphyric |
Speckled and parallel striated with strong orientation; frequent |
Strongly developed angular blocks |
Planar void and a few cavities |
Numerous typic coatings of clay and Fe, occasional external typic hypo-coatings of Fe covering external pore and particle surface, numerous dense infillings of clay+silt+Fe, numerous typic Fe nodules and pseudomorphic nodules of magnetite, abundant papules |
Bt1 |
Scarce: potassium feldspar and quartz Frequent: plagioclase feldspars, ilmenite and magnetite |
Double-spaced porphyric |
Speckled and parallel striated with weak orientation; frequent |
Strongly developed angular blocks |
Planar void and a few cavities |
Numerous typic coatings de clay and Fe, occasional typic hypo-coatings hypo-coatings of Fe covering external pore and particle surface, numerous dense infillings of clay+silt+Fe, abundant typic Fe nodules and pseudomorphic nodules of magnetite and ilmenite, abundant papules |
Bt2 |
Scarce: potassium feldspar and quartz. Frequent: plagioclase feldspars and ilmenite. Common: magnetite |
Single-spaced porphyric |
Speckled and parallel striated with strong orientation; very dominant |
Strongly developed angular blocks |
Planar void and a few cavities |
Abundant typic and crescent coatings of clay and Fe, occasional typic hypo-coatings of Fe, numerous dense infillings of clay+silt+Fe, abundant typic Fe nodules and pseudomorphic nodules of magnetite and ilmenite, abundant papules |
BC |
Scarce: potassium feldspar and quartz. Frequent: plagioclase feldspars. Common: ilmenite and magnetite |
Single-spaced porphyric |
Speckled and parallel striated with strong orientation; dominant |
Moderately developed angular blocks |
Planar void and a few cavities |
Numerous typic and crescent coatings of clay and Fe covering the particles, occasional typic hypo-coatings of Fe, numerous dense infillings of clay+silt+Fe, abundant typic Fe nodules and pseudomorphic nodules of magnetite and ilmenite, occasional papules |
Profile P3 |
A |
Scarce: pyroxene, potassium feldspar and quartz Frequent: sodium-calcium plagioclase, ilmenite and magnetite |
Single-spaced porphyric |
Speckled with weak orientation; very scarce |
Moderately developed angular blocks |
Planar void and a few cavities |
Abundant typic and nodules of Fe, pseudomorphic nodules of magnetite and ilmenite, occasional ellipsoidal excrements and papules |
BA |
Very scarce: pyroxene Scarce: potassium feldspar and quartz Frequent: plagioclase feldspars, ilmenite and magnetite |
Single-spaced porphyric |
Speckled and mono striated with weak orientation; scarce |
Moderately developed angular blocks |
Planar void and a few cavities |
Occasional typic coatings of clay, dense clay infillings, abundant typic Fe nodules and pseudomorphic nodules of magnetite and ilmenite, numerous papules |
Bt |
Scarce: feldspar and quartz Frequent: ilmenite and magnetite |
Single-spaced porphyric |
Speckled and mono striated with strong orientation; frequent |
Moderately developed angular blocks |
Planar void and a few cavities |
Numerous typic coatings of clay and Fe, occasional typic hypo-coatings of Fe, dense infillings of clay+silt+Fe, abundant typic Fe nodules and pseudomorphic nodules of chalcedony, magnetite and ilmenite, numerous papules |
Profile P4 |
BA |
Scarce: feldspar and quartz Frequent: ilmenite and magnetite |
Single-spaced porphyric |
Speckled with weakorientation; scarce |
Moderately developed angular blocks |
Planar void and cavities |
Occasional typic and crescent coatings of clay and Fe, rare dense infillings of clay+silt+Fe, abundant typic Fe nodules and pseudomorphs of magnetite and ilmenite |
Bt1 |
Scarce: feldspar Common: ilmenite and magnetite Dominant: quartz |
Single-spaced porphyric |
Speckled with moderate orientation; frequent |
Moderately developed angular blocks |
Planar void and cavities |
Abundant typic and crescent coatings of clay and Fe, numerous dense infillings of clay+silt+Fe, abundant typic Fe nodules and pseudomorphic nodules of chalcedony and magnetite |
Bt2 |
Frequent: feldspar Common: ilmenite, magnetite and quartz |
Double-spaced porphyric |
Porostriated, granostriated and speckled mosaic, with strong orientation; dominant |
Moderately developed angular blocks |
Planar void and cavities |
Numerous typic and crescent coatings of clay and Fe, rare dense infillings of clay+silt+Fe, abundant typic Fe nodules and pseudomorphic nodules of chalcedony, magnetite and ilmenite, numerous papules |
BC |
Frequent: feldspar and quartz Common: ilmenite and magnetite |
Double-spaced porphyric |
Porostriated, granostriated and speckled mosaic, with strong orientation; dominant |
Strongly developed angular blocks |
Planar void and cavities |
Occasional typic and crescent coatings of clay and Fe, occasional dense infillings of clay+silt+Fe, abundant typic Fe nodules and pseudomorphic nodules of feldspars, chalcedony, magnetite and ilmenite, numerous papules |