Serdobolsky granite is a type of plagiogranite that was mined in the 1770-1930s in quarries on the shore and islands of the north of Lake Ladoga , not far from the city of Serdobol (now Sortavala ).
In historical sources, the term "Serdobol granite" was used in relation to any gray to black hard rocks that were mined in the vicinity of Serdobol. From the point of view of mineralogy, Serdobol granite is a rock of the “Lauwatsar-Impinemian intrusive complex of the early Proterozoic of the Northern Ladoga (1.87-1.86 billion years), represented by phases of gabbroids , diorites and quartz diorites, tonalites , plagiogranites ", often flamendered . [one]
Usage
Serdobolsky granite (in the broad sense of the term) was used as a decorative, sculptural and building stone in St. Petersburg and its suburbs, in particular [2] [3] :
- in the Hermitage columns of the Jordanian staircase are made of it, in the New Hermitage - portico atlantes are carved, columns of the main staircase and the Twenty-Column Hall are made;
- it was used in the external decoration of the Marble Palace , Mikhailovsky Castle and Nikolaev Palace ;
- from the blocks of Serdobol granite laid the base of the Kazan Cathedral and its colonnade;
- made of the base of the pedestal of the monuments to Nicholas I , Catherine II , I. A. Krylov in the Summer Garden ;
- ice-cutters of the Annunciation bridge across the Neva were built from it;
- it in the form of blocks and plates was used for laying foundations .
It is also used in the outer cladding of the Millennium of Russia monument in Novgorod . [four]
Atlanta portico of the New Hermitage
Columns of the Twenty-Column Hall of the New Hermitage
14 eight-meter columns of Peterhof's Lion Cascade
Notes
- ↑ Morozov M.V., Kempe U., Borisov I.V. Mineralogical and petrographic features of the “Serdobol granites” from the historical mine workings of the Sortavala region (Northern Ladoga) // Fedorov Session 2008: Abstracts of the international scientific conference. - SPb. , 2008 .-- S. 287–289 . Archived October 24, 2012.
- ↑ Stone beauty of St. Petersburg ( 1 , 2 ) // site of the Department of Mineralogy, Geological Faculty, St. Petersburg State University
- ↑ Granite Serdobolsky . Site "Bridges of St. Petersburg". Date of treatment October 4, 2012. Archived October 24, 2012.
- ↑ Monument "Millennium of Russia" . Date of treatment October 4, 2012. Archived October 24, 2012.