PERNAMBUCO-PARAÍBA BASIN (departure from Recife)

Field-Trip Chronogram for the Pernambuco-Paraíba Basin

DATE LOCALITY STOP

11/August Pedreira de Cimento Poty - Olinda/PE 30

12/August Pedreira de Cimento Nassau - Goiana/PE 28

Description of outcrops

Stop 30

Quarry of Poty Cement (Votorantim Cement), next to Maria Farinha, Olinda/PE.

Outcrop of the Cretaceous-Tertiary boundary; contact between the Gramame

(Maastrichtian) and Maria Farinha formations (Albertão et al., 1994; Koutsoukos,

1996, 1998). Lithologically, there occurs a sequence of carbonate mudstones

(calcilutites) intercalated with more argillaceous levels (marlstones). The base of the

Maria Farinha Formation is marked by a bioclastic packstone of aproximately 50 cm

of thickness. The sequence of these strata can be associated to climatic variations

with alternation between rainier and drier periods and with storm cycles. The

Cretaceous-Terciary boundary approximately corresponds to the contact between

the Gramame abd Maria Farinha formations, and is marked by a discontinuity of 5th or

6th order.

Contact between the Gramame and Maria Farinha formations. K-T boundary.

The quarry section of the Gramame Formation flooded by heavy rains.

The outcrops of the Maria Farinha Formation are represented by intercalations of

calcilutites and marlstones, with bioturbation (Thalassinoides), interference waves,

and fossils.

Bioturbations (Thalassinoides) in loose limestone blocks

of the Maria Farinha Formation.

Interference wave marks in the limestones of the Maria Farinha Formation.

Fossil gastropodes in loose limestone blocks of the Maria Farinha Formation.

Following the profile in the direction of younger strata, three (3) samplings had been

made, in the probable zones P1, P2 base and P2topo de Blow (1969), referring to the

international foraminiferal zonation.

General view of the mudstone carbonates and marlstones

of the Maria Farinha Formation.

Nautilloid in the limestones of the Maria Farinha Formation.

Stop 28

Quarry of Nassau Cement (Agro-Industrial Itapessoca S.A.), Island of Itapessoca,

Goiana/PE. Outcrops of carbonate mudstones and marlstones interbedded of the

Gramame Formation, Maastrichtian.

General view of the exploration quarry for the limestones

of the Gramame Formation. NASSAU Quarry.

Small cut-and-fill channel features in limestones of the Gramame Formation.

NASSAU Quarry.

Reddish sediment cover of the Barreiras Formation

overlying the carbonate sequence of the Gramame Formation

General view of the exploration levels of the Gramame Formation, with the rhythmic intercalation of carbonate mudstone and marlstone layers. NASSAU Quarry.

Calcite concretions of calcita dispersed in the carbonate mudstones of the Gramame Formation. NASSAU Quarry.

Dispersed nodules of pirite/calcopirite in the carbonate mudstones of the Gramame Formation

References

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