-
Various volcanic arcs
formed in Peru
during the past 30
million years: The
Tacaza Arc 30–15
million years ago, the
Lower Barroso 9–4
million years ago, the...
- the Jur****ic, but
later it
migrated resulting in the
emplacement of the
Tacaza and
Toquepala groups and
finally the
Neogene Barroso group. The present-day...
-
oldest volcanic rocks of the
Western Cordillera are
known under the name "
Tacaza", and
underwent erosion and
folding before the next
phase which is known...
-
present volcanoes are
constructed on this
volcanic "foot"
formed by the
Tacaza and
Barroso sequences. This "foot" is made out of an
ignimbrite plateau...
- products. The
volcanic ba****t
includes the
Miocene to Plio-Pleistocene
Tacaza, Huaylillas,
Sencca and
Barroso Formations; the
latter formation includes...
- the
volcanics in
proximity to
Ubinas are the younger, Eocene-to-Oligocene
Tacaza Group and the more
restricted Miocene-Pliocene
Barroso Group,
which directly...
- Precambrian-Paleozoic and is
buried beneath several pre-Oligocene formations. The
Tacaza formation forms a Miocene-Oligocene
layer of
volcanic and
sedimentary rocks...
-
Group sediments, the
Toquepala intrusive rocks, the 30-24
million years old
Tacaza volcanic rocks, the 24-10
million years old
Huaylillas volcanic rocks and...
- Peru: The Cretaceous-Paleocene
Toquepala Group, the
Miocene Huaylillas and
Tacaza Formations, and the Miocene-Quaternary
Sencca Formation and
Barroso Group;: 252 ...
-
Yucamane is
constructed on a ba****t
formed by the
Paleozoic Tacaza Group (lavas of the
lower Tacaza formation), the Jur****ic Yura
Group (sediments of the Hualhuani...
