File:Gneis Ollo de sapo.008 - Río Sor.jpg
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editDescriptionGneis Ollo de sapo.008 - Río Sor.jpg |
Español: Gneis de la formación Ollo de Sapo. Esta es una roca metamórfica de origen magmática (es dicir, un ortogneis). En el caso de la imagen, se formó a partir de materiales ácidos expulsados por un conjunto de volcanes submarinos (de hace 475 millones de años) que se extendieron desde el norte de Galicia hasta la Sierra de Guadarrama. El nombre era conocido por los habitantes de la zona, y fue citado por Hernández Sampelayo en 1922. Isidro Parga Pondal indicó en 1964 que el nombre era debido a los porfiroclastos (cristales) azulados de cuarzo comunes en los porfiroides de bajo grado (una de las facies de la formación); también incluye grandes porfiroblastos de feldespato, que debido a su tamaño, a veces sobresalen de la matriz debido a la erosión de esta.
Foto realizada durante una GeoRuta junto al Río Sor, entre los Municipios de Mañón (A Coruña) y O Vicedo (Lugo), en Galicia, España.
Galego: Gneis da formación Ollo de Sapo. Esta é unha rocha metamórfica de orixe magmática (é dicir, un ortogneis). No caso da imaxe, formouse a partir de materiais ácidos expulsados por un conxunto de volcáns submariños (de hai 475 millóns de anos) que se extenderon desde o norte de Galicia ata a Serra de Guadarrama. O nome era coñecido polos habitantes da zona, e foi citado por Hernández Sampelayo en 1922. Isidro Parga Pondal indicou en 1964 que o nome era debido aos porfiroclastos (cristais) azulados de cuarzo comúns nos porfiroides de baixo grao (unha das facies da formación); tamén inclúe grandes porfiroblastos de feldespato, que debido ao seu tamaño, ás veces sobresaen da matriz debido á erosión de esta.
Foto realizada durante unha XeoRuta xunto ao Río Sor, entre os Municipios de Mañón (A Coruña) e O Vicedo (Lugo), en Galicia, España. |
Date | |
Source | Own work |
Author | Fernando Losada Rodríguez |
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Camera manufacturer | motorola |
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Camera model | moto g(60) |
Exposure time | 1/100 sec (0.01) |
F-number | f/2.2 |
ISO speed rating | 194 |
Date and time of data generation | 12:07, 2 June 2024 |
Lens focal length | 1.37 mm |
Width | 3,264 px |
Height | 1,836 px |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Microsoft Windows Photo Viewer 10.0.22621.1 |
File change date and time | 00:29, 3 June 2024 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 12:07, 2 June 2024 |
Meaning of each component |
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APEX shutter speed | 6.643 |
APEX aperture | 2.27 |
APEX exposure bias | 0 |
Maximum land aperture | 2.27 APEX (f/2.2) |
Light source | D65 |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 923490 |
DateTimeOriginal subseconds | 923490 |
DateTimeDigitized subseconds | 923490 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | Undefined |
White balance | Auto white balance |
Digital zoom ratio | 1.61 |
Focal length in 35 mm film | 1 mm |