4,331
edits
Santiago: Difference between revisions
m
→Geology
mNo edit summary |
m (→Geology) |
||
| Line 176: | Line 176: | ||
== Geology == | == Geology == | ||
[[File:Santiago Granite Quarry.jpg|thumb|left|200px|One of Santiago's active granite quarries.]] | |||
Santiago's geology is diverse, with a variety of rock types found throughout the state. The state's bedrock is primarily composed of ancient Precambrian and Paleozoic rocks, which were formed over 500 million years ago. These rocks include gneiss, schist, granite, and other metamorphic rocks. In the Cerrado region of Santiago, there are also significant deposits of sedimentary rocks such as sandstone and shale. | |||
One notable feature of Santiago's geology is its abundance of peridot and beryl. Peridot, the state gemstone, is a green mineral that is commonly found in volcanic rocks. It is often associated with basaltic lavas, and indeed many of the peridot deposits in Santiago are found in volcanic rocks. Beryl, the state mineral, is a mineral that forms in pegmatites, which are coarse-grained igneous rocks that form when magma cools slowly. Santiago's pegmatites are particularly rich in beryl, with deposits of aquamarine and emerald also found in the state. | |||
In addition to peridot and beryl, Santiago has significant deposits of other minerals such as iron ore, copper, and gold. The state's mineral wealth has played an important role in its economy, with mining being a significant industry in many parts of the state. | |||
== Government and politics == | == Government and politics == | ||