Columnar siltstones display on the northeast border of the Asuncion Rift in the City of Limpio

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DOI:

https://doi.org/10.32480/rscp.2020.25.2.121

Keywords:

columnar sandstones and siltstones, rift of Asunción, nephelinites

Abstract

Coincident with one of the main faults of the Asuncion rift, it is exposed a small elevation dome shaped, constituted by columnar sandstones cerro  Ko?   likewise  on  the border   of the river Salado valley.  The  columnar prisms shows  great development of their sides and dimensions, where it is supposed an alkaline igneous body underneath (same as their regional congeners) as responsible of the thermic effect and mechanical contraction due to water loss off the clastic material, for the growth and evolution of the columnar jointing. It is ascertained an abandoned quarry certainly depredated.

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References

1. Eckel E., Geology and Mineral Resources of Paraguay – A Reconnaissance. Geological Survey Professional Paper 327. United States Government Printing Office. Washington; 1959.

2. Miraglia L., Vulcanismo Postpliocenico Andino a lo largo del Río Paraguay. Soc. C. Par., Conferencias, Asunción, 1962: 73-80 pp.

3. Arribas A., Latorre C., El Origen de la Disyunción Columnar en Areniscas: caso de las Cuarciarenitas de Areguá (República del Paraguay), Madrid, Tecniterrae; 1982.

4. Dirección de Recursos Minerales (MOPC), Meta Areniscas Columnares del Cerro Koi y Chorori – Informe Técnico, Angel Spinzi, Asunción; 1986.

5. Velázquez V, Giannini P, Riccomini C, Sallun A, Hachiro J, Gomes C., The columnar joints in the Patiño Formation sandstones, Eastern Paraguay: a dynamic interaction between dyke intrusion, quartz dissolution and cooling-induced fractures. Epis., 2008, 31(3): 302-308 pp.

6. Gomes C. B., Castillo A.M., Gadea M., Comin-Chiaramonti P., Polygonal Jointing in Sandstones from Easter Paraguay. Ser. Corr. Geol., 2014, 30 (1): 13-23 pp.

7. Velázquez V., Provincia Alcalina Central, Paraguai Centro-Oriental: Aspectos Tectónicos, Petrográficos e Geocronológicos. Tesis de Maestría. Universidad de São Paulo, São Paulo; 1992.

8. Comin-Chiaramonti P., Civetta L., Petrini R., Piccirillo E., Bellieni G., Censi P., Bitschene P., Demarchi G., De Min A., Gomes C., Castillo A., Velázquez J., Terciary Nephelinitic Magmatism in Easter Paraguay: Petrology, Sr-Nd isotopes and genetic relationships with associated spinel, peridotite-xenoliths. Eur. J. Mineral, 1991, 3: 507-525 pp.

9. Genez L., Caracterización del Ambiente de Sedimentación de las Areniscas Columnares del Cerro Koi de Areguá, Paraguay Oriental. Tesis para la obtención de Grado, Mención Geología. Facultad de Ciencias Exactas y Naturales – UNA.. San Lorenzo; 2014.

10. Velázquez V., Riccomini C., Gomes C., Figueredo L., Figueredo C., Relações Tectônicas do Magmatismo Alcalino do Paraguai Oriental. Rev. IG, 1998, 19(1/2): 43-49 pp.

11. Riccomini C., Velázquez V., Barros G., Cenozoic Lithospheric Faulting in the Asunción Rift, Eastern Paraguay. Jour. S. Amer. Earth Scien., 2001, 14: 625-630 pp.

12. Proyecto PAR 83/005, Mapa Geológico del Paraguay. Texto Explicativo. Comisión Nacional de Desarrollo Regional. Ministerio de Defensa Nacional. Asunción; 1986.

13. Dirección de Recursos Minerales (MOPC) e Instituto Federal de Geociencias y Recursos Naturales (BGR), Hoja Caacupé 5470. Texto Explicativo. Adela Dionisi, Asunción; 1999.

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Published

2020-10-31

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How to Cite

1.
Columnar siltstones display on the northeast border of the Asuncion Rift in the City of Limpio. Rev. Soc. cient. Py. [Internet]. 2020 Oct. 31 [cited 2025 Oct. 7];25(2):121-30. Available from: https://sociedadcientifica.org.py/ojs/index.php/rscpy/article/view/120

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