Or maybe a better question "What did Monty Python ever do for us?" - well they gave us the wonderful quote "What did the Romans..." to introduce any article about Roman civilisation or technology!
Seller Baltasar Sanchez from Spain has been kind enough to share this blog about a Roman archeological site in Spain. Here it is below.
Cerro de los Almadenes, in the Segovian town of Otero de Herreros is the best representation of Roman mining in the center of the Iberian Peninsula.
Even though the existence of these mining works was known of old, due to the presence of numerous smelting slags, they have not been studied in depth until 2009 and following.
Although there are indications of works prior to Roman presence, and settlements since the Bronze Age, copper deposits exploitation took place between the second half of the first century BC and the first half of the first century AD. Subsequent works have concluded that the bulk of the exploitation took place between 10 BC and 40 AD. The excavations carried out in 2013 have exposed Visigoth furnaces (Fifth and Sixth centuries) which show that the exploitation lasted until this century at least.
The excavations carried out in 2011 revealed the existence of several Roman furnaces between 5 and 7 meters high. These furnaces were of three types: toasting, reduction and reverberation.
The process of obtaining copper consisted of:
Slags occupied a large area in the ovens’s vicinity. It is estimated that they could reach 250,000 m3. These were important more recently when part of them were used in the works of San Rafael to Segovia highway in 1965.
This week we have an auction running for a piece of slag from this Roman field, very representative of the reduction process: cordiform and with a nice metallic ocher color. Not your average mineral specimen but a good piece of ancient mining history.
We hope you like it!.