The Mindoro block is a
microcontinental block located in the
Philippine Mobile Belt and the east side of
North Palawan Block
North Palawan Block is a microcontinental block situated in the western Philippines and the southern tip of the Manila Trench. The North Palawan block is considered to form the northeastern portion of a much larger area of block faulted and fou ...
. It has comprises a metamorphic basement (Mindoro Metamorphics of Teves, 1953) of unknown but probably pre-late cretaceous age, overlain locally by upper cretaceous
basalts (Karig, 1983), and more regionally succeeded by a probable upper eocene sequence of basinal clastic rocks, plus local basalt intercalations and
carbonates. These rocks are exposed over a broad area of northern and west-central Mindoro as well as on the
Lubang Islands in
Verde Island Passage. The Mindoro block is bounded on the west by the
Mindoro Suture Zone, and on the north by the
Verde Passage Suture (Karig, 1983), which separates it from the
Zambales Ophiolite
Zambales, officially the Province of Zambales ( fil, Lalawigan ng Zambales; ilo, Probinsia ti Zambales; Pangasinan: ''Luyag/Probinsia na Zambales''; xsb, Probinsya nin Zambales), is a province in the Philippines located in the Central Luzon re ...
terrane of Luzon. The eastern terrane boundary may be the
East Mindoro Fault Zone, a probable transcurrent boundary that has not yet been studied, but which displays evidence of recent activity (Karig, 1983). Late Miocene and Pliocene basinal clastic strata lie east of this fault zone (Metal Mining Agency, 1982), but it is not known if subjacent rocks are related to rocks of the Mindoro block, or if they are part of a third terrane on Mindoro.
[{{Cite journal , last=Sarewitz , first=Daniel R. , last2=Karig , first2=Daniel E. , title=Processes of allochthonous terrane evolution, Mindoro Island, Philippines , journal=Tectonics , date=August 1986 , volume=5 , issue=4 , pages=525–552, doi=10.1002/(issn)1944-9194 , doi-access= ]
Geology
The Mindoro block has two division located in the island of Mindoro: the Northeast Mindoro (see the list of stratigraphic formations in
North Palawan Block
North Palawan Block is a microcontinental block situated in the western Philippines and the southern tip of the Manila Trench. The North Palawan block is considered to form the northeastern portion of a much larger area of block faulted and fou ...
) and the Southwest Mindoro. In Southwest Mindoro comprises 11 geologic formations namely Mansalay Formation (
sandstone,
shale
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especial ...
,
siltstone
Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility.Blatt ''et al.'' 1980, p ...
, minor
limestone,
conglomerate
Conglomerate or conglomeration may refer to:
* Conglomerate (company)
* Conglomerate (geology)
* Conglomerate (mathematics)
In popular culture:
* The Conglomerate (American group), a production crew and musical group founded by Busta Rhymes
** Co ...
), Agbahag Conglomerate, Caguray Formation (mudstone, siltstone, shale, sandstone, conglomerate, limestone), Bugtong Formation (limestone, siltstone, sandstone, conglomerate, agglomerate), Tangon Formation (shale, sandstone), Napisian Formation (shale, sandstone,
coal beds, conglomerate, limestone), Pocanil Formation (limestone, shale, siltstone, sandstone, conglomerate), Punso Conglomerate (conglomerate, sandstone, mudstone, shale), Famnoan Formation (conglomerate, sandstone, shale, limestone), Balanga Formation (sandstone, limestone; minor mudstone and conglomerate), and Oreng Formation (limestone, conglomerate).
See also
*
Mindoro Suture Zone
References
Continental fragments
Geology of the Philippines