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Sample information
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Biozone
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Discussion
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Sample: 1249.4–1249.5 ft (380.82–380.85 m) |
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Palynological zone: Zone V |
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Stage determination: late Turonian |
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Stratigraphic correlation: South Amboy Fire Clay (lower Magothy Formation) |
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Paleoecology: nonmarine |
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Palynological recovery: very poor |
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Diagnostic taxa: |
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Pollen |
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Heidelbergipollis sp. A Christopher |
Amboy Stoneware Clay |
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Osculapollis sp. C Christopher |
Oldbridge–Cliffwood |
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Tricolporate type 6 Doyle 1969 |
Magothy |
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Sample: 1256.4–1256.6 ft (382.95–383.01 m) |
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Palynological zone: Zone V (dating based on sample at 1285.3 ft [391.76 m]) |
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Stage determination: late Turonian |
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Stratigraphic correlation: South Amboy Fire Clay (lower Magothy Formation) |
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Paleoecology: nonmarine |
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Palynological recovery: very poor |
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Diagnostic taxa: |
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Pollen |
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Tricolporites distinctus |
II–V |
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Tricolporate type 2 Doyle 69 Fig. F3 |
Raritan (Zone IV) |
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Triatriopollenites sp. |
Raritan–Magothy |
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Spores |
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Rugubivesiculites reductus |
upper Patapsco–Maastrichtian |
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Araucariacites australis |
Jurassic–Cretaceous |
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Sample: 1257.7–1257.9 ft (383.35–383.41 m) |
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Barren |
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Sample: 1285.3–1285.5 ft (391.76–391.82 m) |
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The appearance of several species of triporates of the genera Complexipollis and Porocolpopollenites and the absence of triporates, typical of the middle and upper Magothy in both this sample and at 1291.8–1291.95 ft (393.74–393.79 m) strongly suggests Zone V (SAFC) for this sample. |
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Palynological zone: Zone V |
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Stage determination: late Turonian |
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Stratigraphic correlation: South Amboy Fire Clay (lower Magothy Formation) |
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Paleoecology: nonmarine |
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Palynological recovery: poor |
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Diagnostic taxa: |
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Pollen |
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Complexipollis sp. Type 1 |
V (SAFC) |
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Complexipollis sp. Type 2
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V (SAFC) |
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Complexipollis sp. D Christopher 1979
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V (SAFC)–upper Magothy |
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Tricolporites distinctus |
II–V |
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Sample: 1291.8–1291.95 ft (393.74–393.79 m) |
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No Raritan or upper Magothy triporates are found in this sample. The presence of several species of Complexipollis common to the SAFC places it at this horizon.
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Palynological zone: Zone V |
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Stage determination: late Turonian |
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Stratigraphic correlation: South Amboy Fire Clay (lower Magothy Formation) |
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Paleoecology: nonmarine |
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Palynological recovery: poor |
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Diagnostic taxa: |
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Complexipollis sp. D Christopher 1979
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V (SAFC)–upper Magothy |
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Complexipollis sp. Type 2 Bebout |
V (SAFC) |
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Porocolpopollenites sp. Doyle 1969 |
V |
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Complexipollis sp. B Doyle |
V (SAFC) |
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Sample: 1320.2–1320.3 ft (402.40–402.43 m) |
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Although there are few palynomorphs in this sample, Complexipollis sp. A is one of the oldest triporate-Normapolle types that are found in the Woodbridge Clay member of the Raritan Formation. It is very similar to the Atlantpollis complex of the Woodbridge Clay. |
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Palynological zone: Zone IV |
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Stage determination: late Cenomanian |
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Stratigraphic correlation: Raritan (Woodbridge member) |
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Paleoecology: marine shelf |
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Palynological recovery: poor |
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Diagnostic taxa: |
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Pollen |
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Complexipollis sp. A Doyle |
IV (Raritan) |
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Tricoporoidites sp. A Doyle |
III–IV |
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Dinoflagellates |
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Epelidosphaerida spinosa Davey |
Cenomanian of the Scotia Shelf |
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Sample: 1341–1342 ft (408.74–409.04 m) |
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Palynological zone: Zone IV |
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Stage determination: late Cenomanian |
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Stratigraphic correlation: Raritan (Woodbridge member) |
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Paleoecology: marine shelf |
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Palynological recovery: very poor |
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Diagnostic taxa: |
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Pollen and Spores |
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Piceapollenites alatus |
I–IV |
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Araucariacites australis |
II–IV |
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Cicatricosisporites spp. |
Long ranging |
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Gleicheniidites senonicus |
Cretaceous |
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Dinoflagellates |
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Hystrichosphaeridium (fragment) |
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Callaiosphaeridium asymmetricus |
Hauterivian–Coniacian on the Scotian shelf |
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Sample: 1353.8–1354.0 ft (412.64–412.70 m) |
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The diversity of palynomorphs is very low in this sample. The organic matter is dominated by vitrain and fusain, which is common for marsh conditions in the Bass River–Raritan horizons. Atlantapollis verrucosa is a key species only found in Zone IV. It is easy to identify and is one of the earliest Normapolles to appear in the Cretaceous section. The appearance of numerous tiny, spherical acritarchs (10–12 µm), and the absence of the larger Spiniferites types (dinoflagellates) suggests brackish water conditions. |
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Palynological zone: Zone IV |
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Stage determination: late Cenomanian |
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Stratigraphic correlation: Raritan (Woodbridge member) |
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Paleoecology: brackish |
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Palynological recovery: very poor |
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Diagnostic taxa: |
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Dinoflagellates |
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Cleistosphaeridium sp. |
Similar to those found in the Woodbridge Clay |
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Exochosphaeridium bifidum |
upper Albian–Campanian |
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Micrhystridium spp. |
When dominant, indicates brackish conditions |
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Pollen |
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Atlantapollis verrucosa |
IV (Raritan) |
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Sample: 1383.8–1384.0 ft (421.78–421.84 m) |
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It is possible that Ajatipollis sp. A extends into Zone IV, although it has not been studied. If it does, then given the paucity of palynomorphs in this sample, dating is uncertain. The sample contains mostly vitrain and fusain.
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Palynological zone: Zone III? |
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Stage determination: lower Cenomanian |
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Stratigraphic correlation: subsurface Raritan of Delaware, Raritan of Maryland |
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Paleoecology: brackish–marine |
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Palynological recovery: very poor |
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Diagnostic taxa: |
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Pollen |
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Ajatipollis sp. A Doyle |
IIB–III, rare in I, common in III |
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Spores |
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Camarozonosporites rudus |
Found commonly in Zone III |
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Acritarchs and dinoflagellates |
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Micrhystridium spp. |
When dominant indicates brackish conditions |
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Cyclonephelium sp. |
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Sample: 1411.2–1411.4 ft (430.13–430.19 m) |
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Palynological zone: Zone III |
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Stage determination: early Cenomanian |
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Stratigraphic correlation: uppermost Patapsco: subsurface Raritan of Delaware, Raritan of Maryland |
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Paleoecology: nonmarine |
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Palynological recovery: very poor |
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Diagnostic taxa: |
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Pollen and spores |
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Rugubivesiculites sp. |
II–Maastrichtian |
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Appendicisporites potomacensis |
I–III |
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Brenneropollis peroreticulatus |
I–III |
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Stephanocolpites tectorius |
III |
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Tricolporopollenites sp. A Doyle |
III |
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Sample: 1434.2–1434.3 ft (437.14–437.17 m) |
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Palynological zone: Zone III |
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Stage determination: early Cenomanian |
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Stratigraphic correlation: uppermost Patapsco: subsurface Raritan of Delaware, Raritan of Maryland |
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Paleoecology: nonmarine |
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Palynological recovery: poor |
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Diagnostic palynomorphs: |
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Appendicisporites potomacensis |
I–III |
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Cingulatisporites eukirchensoides |
Albian of eastern Austrlia |
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Tricolporopollenites triangulus |
IIC–III |
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Tricolporopollenites sp. B Doyle |
III |
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Sample: 1473.5–1473.7 ft (449.12–449.18 m) |
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Palynological zone: Zone III |
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Stage determination: early Cenomanian |
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Stratigraphic correlation: uppermost Patapsco: subsurface Raritan of Delaware, Raritan of Maryland |
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Paleoecology: nonmarine |
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Palynological recovery: fair |
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Diagnostic taxa: |
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Pollen |
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Ajatipollis sp. A Doyle |
IIB–III, rare in I, common in III |
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Tricolpites nemejci Pacltova |
III |
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Tricolporoidites sp. A Doyle |
III |
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Spores |
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Camarozonosporites rudus |
Found commonly in Zone III |
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Gleicheniidites circinidites |
Potomac Group |
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Appendicisporites tricornatatus |
Potomac Group |
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Sample: 1495.3–1495.5 ft (455.77–455.83 m) |
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Both Subzone IIC and Zone III forms are found in this sample. The abundance of bisaccate coniferous pollen is a very common aspect of the upper Patapsco. This most likely reflects cooler paleoclimatic conditions at this time. The boundaries between Subzone IIC and Zone III have never been defined in the literature so a mixed assemblage creates a dating problem. |
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Palynological zone: Zone IIC to lower III |
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Stage determination: early Cenomanian |
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Stratigraphic correlation: uppermost Patapsco: Elkneck Beds of Maryland to subsurface Delaware and Raritan of New Jersey |
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Paleoecology: brackish |
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Palynological recovery: good |
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Diagnostic taxa: |
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Angiosperm Pollen |
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Peromonolites allenensis Brenner |
I–II |
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Tricolpies nemejci Pacltova |
III |
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Tricolpites triangularus Groot, Penney & Penney |
IIC–III |
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Spores |
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Appendicisporites tricornatus |
Potomac Group |
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Gleicheniidites circiidites |
Potomac Group |
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Lycopodiacidites triangularis Brenner |
Potomac Group |
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Taurocosporites spackmani Brenner |
IIB–IIC |
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Gymnosprem Pollen |
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Alisporites bilateris |
Potomac Group |
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Abietineaepollenites spp. |
Potomac Group |
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Rugubivesiculites rugosus IIC type |
IIC–lower III |
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Abietineaepollenites microviculatus |
Potomac Group |
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Acritarchs |
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Micrhystridium spp. |
When dominant indicates brackish conditions |
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