Cerro Pedreira
Occurrence number:
130-00-030
Carbonatite:
No
Narrative:
Cerro Pedreira is a syenitic alkaline complex located on the Paraguay River of north-western Paraguay, belonging to the Alto Paraguay Igneous Province.
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Complete list of alkaline rocks and carbonatites
Cerro Siete Cabezas
Occurrence number:
130-00-029
Carbonatite:
No
Narrative:
Cerro Siete Cabezas is a syenitic alkaline complex located on the Paraguay River of north-western Paraguay, belonging to the Alto Paraguay Igneous Province.
Cryptic Tuff (Bellavista Canyon, Santa Clara Canyon)
Occurrence number:
108-00-022
Carbonatite:
No
Narrative:
Central Chihuahua, Mexico is host to a stratigraphic sequence of calc-alkaline, alkaline, and peralkaline eruptives of varying composition exposed primarily at two localities: Bellavista Canyon and Santa Clara Canyon.
Ayulta
Occurrence number:
108-00-018
Carbonatite:
No
Narrative:
The Ayulta Volcanic Field of Jalisco, Mexico is located in the volcanic front of the western Mexican Volcanic Belt.
Hermosillo
Occurrence number:
108-00-024
Carbonatite:
No
Narrative:
The Hermosillo region of Sonora, Mexico is host to a number of mesas formed of peralkaline rhyolite. Outcrops are scattered over a 25 x 40 km area and are composed of a single unit known as the Hermosillo ignimbrite, with layers oriented horizontal to gently dipping west.
Latir Volcanic Field
Occurrence number:
174-00-157
Carbonatite:
No
Narrative:
The Latir Volcanic Field is located in the Sangre de Cristo Mountains, northern New Mexico, with rocks and erosional remnants of the field covering an area of ~1200 km2.
Zuni-Bandera Volcanic Field
Occurrence number:
174-00-155
Carbonatite:
No
Narrative:
The Zuni-Bandera Volcanic Field, west central New Mexico is a Quaternary aged volcanic field located in the transition zone between the Colorado Plateau and the Basin and Range.
Robbers Roost
Occurrence number:
174-00-158
Carbonatite:
No
Narrative:
Robbers Roost, located 25 km northeast of Hanksville, Utah, is a geographical feature of the Green River Desert that is home to lamproite dykes.
Bingham District (Rose Canyon)
Occurrence number:
174-00-154
Carbonatite:
No
Narrative:
The Bingham District, northern Utah is home to one of the world’s most renowned Cu-Au-Mo porphyry deposits formed from an intrusion of primarily quartz monzonite, with minor “biotite porphyry” and one example of a minette dyke.
Mormon Mountain Volcanic Field (House Mountain)
Occurrence number:
174-00-153
Carbonatite:
No
Narrative:
Mormon Mountain Volcanic Field (MMVF), located in northern Arizona, is a Cenozoic volcanic field situated in the transition zone between the Basin and Range and the Colorado Plateau near the southwestern margin of the latter.