NC |
Surface |
Well to moderately separated granular. Moderately separated subangular blocks, formed by coalesced granules. Compound packing voids. |
Subangular quartz grains, fine sand, and opaque minerals |
Dark brown to reddish-brown, undifferentiated to granostriated b-fabric |
Enaulic |
Roots, root traces, humified organic matter, coal and nodules |
Typical ferruginous nodules and loose continuous inffilings |
0.10 m |
Well separated granular. Moderately separated subangular blocks, formed by coalesced granules. Complex packing voids. |
Subangular quartz grains, fine sand, and opaque minerals |
Reddish-brown, undifferentiated to granostriated b-fabric |
Enaulic |
Roots, root traces, humified organic matter, coal and nodules |
Typical ferruginous nodules and loose continuous inffilings |
0.50 m |
Rounded well separated granular. Complex packing voids. |
Subangular quartz grains, fine sand, and opaque minerals |
Reddish-brown to reddish-yellow, undifferentiated to granostriated b-fabric |
Enaulic |
Root traces, humified organic matter, coal and nodules |
Typical ferruginous nodules and loose continuous inffilings |
NT |
Surface |
Vughy with little or not at all connected voids, without noticeable aggregates. Rounded to subrounded voids, with circular orientation. There are also root channels |
Subrounded to rounded quartz grains, fine to medium sand, and opaque minerals |
Reddish-brown with some yellowish-red portions, undifferentiated b-fabric |
Porphyric |
Roots, organic punctuations in micromass and charcoal |
Typical ferruginous nodules |
0.10 m |
Moderately separated subangular blocks, with planar voids. Also occur vughs with poorly connected voids. |
Subrounded to rounded quartz grains, fine to médium sand, and opaque minerals |
Brown to reddish-brown, undifferentiated b-fabric |
Porphyric |
Roots, traces of roots, organic punctuations in micromass and charcoal |
Typical ferruginous nodules |
0.50 m |
Well to moderately separated granular. Compound packing voids. |
Subrounded quartz grains, fine to médium sand, and opaque minerals |
Dark brown to reddish-brown, undifferentiated to granostriated b-fabric |
Enaulic |
Organic punctuations, coal and nodules |
Typical and concentric ferruginous nodules |
GHS |
Surface |
Moderately separated granular. Moderately separated subangular blocks. Compound packing voids and vughs. |
Subrounded quartz grains, fine to médium sand, and opaque minerals |
Dark brown, undifferentiated to granostriated b-fabric |
Enaulic-porphyric |
Traces of roots, organic punctuations in the micromass, nodules and charcoal |
Typical ferruginous nodules |
0.10 m |
Poorly separated subangular blocks. Vughy with poorly connected pores. The vughs are rounded to subrounded, and, in some cases, oriented. |
Subrounded quartz grains, fine to medium sand, and opaque minerals |
Redissh to reddish-brown, undifferentiated b-fabric |
Porphyric |
Traces of roots, organic punctuations in the micromass, nodules and charcoal |
Typical ferruginous nodules |
0.50 m |
Vughy with poorly connected pores. The vughs are rounded to subrounded, and shown circular orientation. Poorly separated subangular blocks, with planar voids. |
Subrounded quartz grains, fine to medium sand, and opaque minerals |
Redissh to reddish-brown, undifferentiated b-fabric |
Porphyric |
Organic material soaking the micromass and charcoal |
Typical ferruginous nodules |
DP |
Surface |
Poorly separated planar microstruscture, with voids of major axis parallel to the surface. Subordinately, angular blocks, poorly separeted, with planar voids. |
Subrounded quartz grains, fine to medium sand, and opaque minerals |
Reddish-brown, undifferentiated to monostriated b-fabric |
Porphyric |
Traces of roots, organic punctuations in the micromass, and charcoal |
- |
0.10 m |
Poorly separated planar microstruscture, with voids of a major axis parallel to the surface. Poorly separated angular blocks, with planar voids. |
Subrounded quartz grains, fine to medium sand, and opaque minerals |
Reddish-brown, undifferentiated to monostriated b-fabric |
Porphyric |
Traces of roots, organic punctuations in the micromass, and charcoal |
Typical ferruginous nodules |
0.50 m |
Moderately separated granular. Complex packing voids |
Subrounded quartz grains, fine to medium sand, and opaque minerals |
Dark brown, undifferentiated to granostriated b-fabric |
Enaulic |
Organic material soaking the micromass and charcoal |
Typical ferruginous nodules |