1. REVISIÓN BIBLIOGRÁFICA
1.2 Vidrio y esmaltes opacos
1.2.3 Propiedades de los esmaltes
Description:
Slender test, parallel to slightly tapering sides, fine grained, occasional abrupt cornering" of growth.Occurrence:
Offshore Cabinda found in CABGOC 128-3 at 10,100", and in CABGOC 115-1X between 6,300" and 9,660".Rhizammina
sp. 4
Plate 39, figure 11
Description:
Bulbous test, inflated, smooth wall, sub-parallel to tapering sides, thick wall, constrictions.Occurrence:
Offshore Cabinda found in CABGOC 128-3 at 10,160’, and in CABGOC 115-1X between 5,700’ and 9,960’.Remarks:
Poorly preserved fragments.Rhizammina
sp. 5
Plate 39, figure 12
Description:
Large robust test, some flattening, moderate grain size, thick wall, roughened surface, oblique constrictions.Occurrence:
Offshore Cabinda found in CABGOC 128-3 at 10,160’, and in CABGOC 115-1X between 4,980’ and 10,020’Remarks:
Poorly preserved fragments.Rhizammina
sp. 6
Plate 39, figure 13
Description:
Slender test, flattened, parallel sides, small grain size with large proportion of cement, light colour with darkened central furrow, thin wall.Occurrence:
Offshore Cabinda found in CABGOC 128-3 between 6,9 8 0 ’ and 9,080’, and in CABGOC 115-1X between 6,600’ and 9,240’.Remarks:
Poorly preserved fragments.Rhizammina
sp. 7
Plate 39, figure 14
Description:
Semi-inflated narrow test, sub-parallel sides, moderate grain size, occasional slight constrictions and inflated portions.Occurrence:
Offshore Cabinda found in CABGOC 128-3 at 7,040’, and in CABGOC 115-1X between 6,480’ and 7,920’.Remarks:
Poorly preserved fragments.Rhizammina
sp. 8
Plate 39, figure 15
Description:
Distinctive fragments, parallel sides and flattened. Finely agglutinated. Irregularly coiled.Occurrence:
Single specimen in sample 2709 of Venezuela. Offshore Cabinda found in CABGOC 128-3 at 9,080’, and in CABGOC 115-1X between 7,080’ and 9,300’.Remarks:
Possibly grew attached to a rounded surface. Poorly preserved fragments. PossiblyTolypammina vagans (Brady), insufficient material recovered for absolute identification.
Rhizammina sp. 9
Description; Delicate slender test, coarse grained, parallel sides, occasional irregular constrictions.
Occurrence: Occurs in Lapugiu du Sus and the Chechis Marls, Romania. Remarks: Poorly preserved fragments.
Rhizammina sp. 10
Description: Light coloured, robust test, coarse grained, thick wall, parallel to sub-parallel sides. Occurrence: Observed in Sacel, Romania.
Remarks: Poorly preserved fragments.
Rhizammina sp. 11
Description: Elongate brittle test, narrow, parallel sides, smooth irregular wall, coarse grain size with high proportion of cement, dark colour.
Occurrence: Observed in Sacel, Romania. Remarks: Poorly preserved fragments.
Rhizammina spp.
Description: Small fragile remains of agglutinating tubes. Cylindrical to compressed in cross section, of varying lengths. Parallel sides.
Occurrence: Intermittent recovery throughout Venezuelan section, acme in V. henicki Zone. Remarks: Due to the fragmentary recovery of these taxa they have been grouped informally.
Family SACCAMMINIDAE Brady, 1884 Subfamily SACCAMMININAE Brady, 1884 Genus SACCAMMINA Carpenter, 1869
Saccam mina p iacenta (Grzybowski)
Plate 40, figures 1 - 2
Reophax placentaGRZYBOWSK11898, pi. 10, figs. 9 - 1 0 {fideKaminski & Geroch 1993)
Reophax trilobaDYLA2IANKA 1923, pi. 17, fig. 11 {rideKaminski & Geroch 1993)
Saccammina placenta (Grzybowski). -CHARNOCK & JONES 1990, pi. 1, figs. 5 - 6, pi. 13, fig. 4. - KAMINSKI & GEROCH 1993, pi. 2, figs. 5 - 7, pi. 17, fig. 11
Description: Moderate sized, compressed, round test. Periphery often slightly thickened. Wall of moderate grain size. Aperture a simple opening with a short neck.
Occurrence: Offshore Cabinda found intermittently in CABGOC 128-3 between 4,770’ and 10,160’, and frequently in CABGOC 115-1X between 4,370" and 10,020’.
Remarks: Preservation poor, samples often fragmented. Known from Tertiary flysch deposits in Switzerland and France (Brouwer 1965). Comparable forms are evident in the J. Doreen collection.
Saccammina sphaerica Sars
Plate 9, figure 2; Plate 40, figure 3; Plate 67, figure 7
Saccammina sphaerica SARS 1872, p. 532, fig. 272 {fide Ellis & Messina 1940, e t seq.)
Saccammina sphaerica Sars. -CUSHMAN & STAINFORTH 1945, pl. 1, fig. 5. -W EB B 1975, pl. 1, fig. 7. - -HALLER 1980, pl. 1, fig. 3. -THOMPSON 1980, pl. 7, fig. 10. -MORLOTTI 1988, p. 276. -CHARNOCK & JONES 1990, pl. 1, fig. 7, pl. 13, fig. 5. -LUCZKOWSKA 1990, pl. 4, fig. 9. -NO MURA 1992, pl. 1, fig. 12. -OSTERMAN & SPIEGLER 1996, pl. 1, figs. 13 - 14. -CICH A , e t al. 1998, pl. 1, fig. 14
Description; Specimens often crushed. Small, rounded periphery, medium to course grained with smooth exterior, dark in colour. Aperture round with neck.
Occurrence: Occurs at a low frequency from the L. wallacei Zone to^$e V. herricki Zone in
♦4. ‘ *
Venezuela. Occurrence sporadic. Offshore Cabinda found intermittently in CABGOC 128-3 between 4,770' and 10,160’ and frequently in CABGOC 115-1X between 5,040’ and 9,300’. Two specimens recovered from Sacel, Romania.
Remarks: First record of this species from the Agua Salada Formation. Originaiiy described from the Recent of Norway. Known from the Recent sediments of the Philippines (Cushman 1921) and additional Miocene Venezuelan localities (Bermùdez and Fuenmayor 1966). In CABGOC 115-1X specimens occasionally recovered as just the apertural region.
Saccam m ina sp. 1
Plate 9, figure 3
Tholosina sp. 1 POPESCU 1975, pi. 1, fig. 3
Description: Specimens smaller than S. sphaerica and very finely grained. Polished appearance. Aperture normally visible as rounded with a short neck, though not always visible. Occurrence: Very rare, very few specimens recovered. Found between S. transversa and V.
herricki Zones in Venezuela. Offshore Cabinda found in CABGOC 115-1X between 4,920’ and
9,960’.
Remarks: In CABGOC 115-1X becomes more frequent towards the base of the well.
Saccam m ina sp. 2
Plate 67, figure 8
Description: Small nondescript, flattened, light coloured test, aperture not apparent in most specimens, small simple opening without neck in others.
Occurrence: Recovered from Vâlcele, the Chechis Marls, and Sacel, Romania.
Saccam m ina sp. 3
Description: Single specimen with distinctive peripheral flattening giving 'halo’ appearance. Occurrence: Observed in Sacel, Romania.
Superfamily HIPPOCREPINACEA Rhumbler, 1895 Family HIPPOCREPINIDAE Rhumbler, 1895
Subfamily HYPERAMMININAE Elmer & Fickert, 1899 Genus HYPERAMMINA Brady, 1878
Hyperam m ina sp. 1
Plate 40, figure 4
Description; Elongate slender test, parallel sides. Fine grained, high proportion of cement, distinctive horizontal ‘corrugations’ on some portions of test.
Occurrence: Offshore Cabinda found In CABGOC 128-3 at 6 ’980". Remarks: Poorly preserved fragments.
Hyperam m ina sp. 2
Plate 40, figure 5
Description: Robust, large test. Inflated, slightly flattened. Moderate grain size, roughed surface, thick wall, occasional bulbous Inflations.
Occurrence: Offshore Cabinda found In CABGOC 128-3 at 6 ’920’. Remarks: Poorly preserved fragments.
Superfamily AMMODISCACEA Reuss,1862 Family AMMODISCIDAE Reuss, 1862 Subfamily AMMODISCINAE Reuss, 1862 Genus AMMODISCOIDES Cushman, 1909
A m m odlscoides japonlcus Asano & Inomata
Ammodiscoides japonicus ASANO & INOMATA 1952, p. 3, tf. 9 - 11, 2 {fide Ellis & Messina 1940, a t seq.)
Description: Small test, conical. Spiral chamber of uniform diameter, overlaps previous whorls slightly with growth. Medium grain size, smoothly finished with high proportion of cement. Aperture not observed.
Occurrence: Confined to sample 2610 In the V. herricki Zone In Venezuela.
Remarks: Originally described from the Miocene of Japan. First record of this taxon from the Agua Salada Formation. Diaz de Gamero (1985a) refers to an Ammodiscoides sp., however, this Is unflgured so comparison Is Impossible.
A m m odiscoides of. turbinatus Cushman
Plate 9, figures 4a, 4b, 4c
Ammodiscoides turbinatusCUSHMAN 1909, pi. 33, figs. 1 - 6 {fldeEllis & Messina 1940, et. seq.)
Description: Test free, spiral chamber forms a hollow cone gradually Increasing In diameter towards the periphery. Cushman (1909) describes the species s.s. then changing Its plane of colling to produce a 'broadly flaring usually slightly concave’ portion. These specimens do not display this characteristic, all halting growth within the conical phase of development. Wall finely agglutinating, aperture terminal.
Occurrence;
Sporadic recovery between the V. herricki Zone and S. transverse Zone. Acme occurrence in sample 2610.Remarks:
First record of this taxon from the Agua Salada Formation. Diaz de Gamero (1985a) refers to an Ammodiscoides sp., however, this is unfigured so comparison is impossible.Am m odiscoides