|Location is approximate, estimate based on other nearby localities.|
|Latitude & Longitude (WGS84):||40° North , 3° West (est.)|
|Margin of Error:||~9km|
|Other regions containing this locality:||Iberian Peninsula|
|Köppen climate type:||Csb : Warm-summer Mediterranean climate|
|Name(s) in local language(s):||Pegmatita de los Rancajales- Macizo de San Pedro, Soto del Real, Madrid, España|
The San Pedro massif consists mainly of schists and gneiss and intrusions of granitoids which as a consequence of its large amount of volatiles that resulted in differentiated pegmatites, some with more complex mineralogy and complete zonation.
One of the best examples both for its size and completeness of mineralogy is the pegmatite located near the community of Rancajales. Observation of the morphology of the pegmatite and mineral collecting is contingent on the exploitation for feldspar, to open up the formation. Of note is the presence of other outcrops of pegmatites in the massif of San Pedro being difficult to place in a specific municipal area because this mountain lies in several municipalities.
19 valid minerals.
Rock Types Recorded
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-Fisher D.J. (1958), Las Pegmatitas del cerro de San Pedro y sus formaciones encajantes. Tesis licen. Univ. Complutense Madrid 175 pp.
-Gonzalez del Tánago J. (1985), Las Pegmatitas Graníticas de San Pedro, Sistema Central Español. Bol. Soc.Española de Mineralogía: pp.207-217.
- Jiménez Martínez, R., González Laguna, R., Lozano Fernández, R.P., Paradas Herrero, Á., Baeza Chico, E., Torres Matilla, M.J. y Cabrera Andonaegui, B. 2013. Colección de Minerales de las Comunidades y Ciudades Autónomas del Museo Geominero: Catálogo de la Comunidad de Madrid. Cuadernos del Museo Geominero, 16, publicación en CD-ROM.