Table 9. Stratigraphy and lithology of documented rock outcrops along Upper Paraguay river.1

No   Location Km2 Km3Formation Primary rock types4
1.  Passo Simão Nunes Inferior 3373 2132.9 Raizama   Quartz and quartz/feldspar sandstones, siltstones.
2.  Ilha Barranco Vermelho 3348 2108 Raizama   Quartz and quartz/feldspar sandstones, siltstones.
3.  Ilha do Beiçudo 3344 2104 Raizama   Quartz and quartz/feldspar sandstones, siltstones.
4.  Morro Pelado 3332-34 2082-84 Raizama   Quartz and quartz/feldspar sandstones, siltstones.
5.  Passo Papagaio 3318 2078 Raizama   Quartz and quartz/feldspar sandstones, siltstones.
6.  Riacho D. Pedro II 3030 1790 Urucum   Arkose, quartz sandstones, conglomerates.
7.   Ponta do Morro 3030 1790 Urucum   Arkose, quartz sandstones, conglomerates.
8.  Fazenda Acurizal 3004 1764.3 Urucum   Quartz sandstones, metaconglomerates, schists.
9.   Boca do Corixo da Penha 2967 1727.2 Urucum   Quartz sandstones, metaconglomerates, schists.
10.  Amolar 2965 1725 Urucum   Quartz sandstones, metaconglomerates, schists.
11.  Passo Amolar 2960 1720 Urucum   Quartz sandstones, metaconglomerates, schists.
12.  Fazenda Dourados 2957-58 1717-18 Urucum   Quartz sandstones, metaconglomerates, schists.
13.  Morro Dourados 2956 1716.5 Urucum   Quartz sandstones, metaconglomerates, schists.
14.  Passo Piuva Superior 2956 1715.9 Urucum   Quartz sandstones, metaconglomerates, schists.
15.  Ilha do Rufino 2935 1695.4 Urucum   Quartz sandstones, metaconglomerates, schists.
16.   Córrego de Bonfim 2929 1688.6 Bocaína   Calcareous dolomites, calcareous sandstones.
17.  Porto Santa Luzia 2856 1616 Bocaína   Calcareous dolomites, calcareous sandstones.
18.   Fazenda Faia 2804 1564.4 Bocaína   Calcareous dolomites, calcareous sandstones.
19.  Retiro Uberlandia 2778 1538.5 Bocaína   Calcareous dolomites, calcareous sandstones.
20.   Estirão de Agua Branca 2769 1529.4 Bocaína   Calcareous dolomites, calcareous sandstones.
21.   Farolete Balduíno 2762 1521.1 Urucum   Arkose, quartz sandstones, conglomerates.
22.   Barranca Limpa 2714 1473-74 -   Unable to determine.5
23.   Volta Grande 2707 1467 -   Unable to determine.5
24.   Passo Mucunã 2693-94 1453-55 -   Unable to determine.5
25.   Saladeiro Otília 2689 1449 -   Unable to determine.5
26.  Morro da Onça 2569 1329 Coimbra   Layered sandstones.
27.   Estirão de Baía Verde 2549 1309 -   Unable to determine.5
28.   Fuerte Olimpo 2329 1089 -   Unable to determine.5
29.   Passo Cambá Nupá 2281 1041 -   Unable to determine.5
30.   Morro Pão de Açúcar 2275-76 1035-36 A. Fecho dos Morros   Syenites, trachytes, prophyritic trachytes.
31.  Fecho dos Morros 2268-71 1028-31 A. Fecho dos Morros   Syenites, trachytes, prophyritic trachytes.
32.   Passo Tarumã 2251 1011 -   Unable to determine.5

1 Source:    Projecto RADAMBRASIL (1982a&b). 2 Km of Hidrovia, with reference to Buenos Aires as Km 0.
3 Km of Hidrovia, with reference to mouth of Rio Paraguay (Confluencia) as Km 0. 4 Actual rock type(s) may differ from those listed.
5 Field reconnaisance may be required for precise determination.