Minori Cave

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Minori Cave
Philippines relief location map (square).svg
Red pog.svg
Location in the Philippines
Location Peñablanca, Cagayan
Philippines
Coordinates 17°43′17″N121°49′42″E / 17.72139°N 121.82833°E / 17.72139; 121.82833 Coordinates: 17°43′17″N121°49′42″E / 17.72139°N 121.82833°E / 17.72139; 121.82833
Length147 m (482.3 ft)
Elevation200 m (656.2 ft) meters above sea level
GeologyLimestone formation [1]
EntrancesTwo
FeaturesDivided into four chambers
Width7-11 meters

Minori Cave is part of the Callao limestone formation, located in Barangay Quibal, Municipality of Peñablanca, Cagayan Province in Northern Luzon. The said cave has two openings. One, designated as Mouth B, is located at 17° 43' 17" N latitude and 121° 49' 42" E longitude. The other opening, Mouth A is located 17° 43' 21" N latitude and 121° 49' 44" E longitude. The cave has an average elevation of about 200 m (656.2 ft) above sea level, and length and width of 147 m (482.3 ft) and 7 to 11 m (23.0 to 36.1 ft), respectively. The cave is divided into four chambers with mouth A as chamber A and mouth B as chamber D. Chambers B and C are in between the two mouths.

Callao Cave Cave and archaeological site in the Philippines

Callao Cave is one of the limestone caves located in the municipality of Peñablanca, Cagayan province, in the Philippines. The seven-chamber show cave is one of 300 caves that dot the area and the best known natural tourist attraction of the province. The town is named as Peñablanca for the presence of white limestone rocks in the area. Callao Cave is located in the Barangays of Magdalo and Quibal in Peñablanca about 24 km (15 mi) northeast of Tuguegarao City, the capital of the Province of Cagayan.

Cagayan Province in Cagayan Valley, Philippines

Cagayán is a province of the Philippines in the Cagayan Valley region in the northeast of Luzon Island, and includes the Babuyan Islands to the north. The province borders Ilocos Norte and Apayao to the west, and Kalinga and Isabela to the south. Its capital is the city of Tuguegarao.

Contents

Archaeological Findings

The Cagayan Valley Archaeological Project

The Cagayan Valley Archaeological Project was part of a series of archaeological expedition led by anthropologist Robert Fox in 1971 to search for the evidence of the early humans (now the Tabon Man) in the Philippines. Since then, the expedition focused more on the archaeological finds from different individual sites that were found during the expedition. This includes the slopes of the Cagayan Valley, revealing 54 sites rich in a variety of artefacts like paleolithic tools and remains. Some of the major cave sites that were discovered are the famous Callao Cave, Musang Cave, Rabel Cave and the Minori Cave, most of them are part of the Callao limestone formation. The great potential to find important artefacts in Cagayan led to the initiation of The Cagayan Valley Archaeological Project. From 1976 to 1982, 93 caves were already explored and 52 of which housed a variety of archaeological finds.

Robert Bradford Fox (1918–1985) was an anthropologist and leading historian on the prehispanic Philippines.

Tabon Man Oldest Homo sapiens fossil ever found in the Philippines

Tabon Man refers to remains discovered in the Tabon Caves in Lipuun Point in Quezon, Palawan in the Philippines. These were discovered by Robert B. Fox, an American anthropologist of the National Museum of the Philippines, on May 28, 1962. These remains, the fossilized fragments of a skull and jawbone of three individuals, were believed to be the earliest human remains known in the Philippines which date back to 16,500 years ago, until a metatarsal from the Callao Man discovered in 2007 was dated in 2010 by uranium-series dating as being 67,000 years old. The Tabon fragments are collectively called "Tabon Man" after the Tabon Cave, the place where they were found on the west coast of Palawan. Tabon Cave appears to be a kind of Stone Age factory, with both finished stone flake tools and waste core flakes having been found at four separate levels in the main chamber. Charcoal left from three assemblages of cooking fires there has been Carbon-14-dated to roughly 7000, 20,000, and 22,000 BCE.

1981 Excavation

From March to October 1981, the National Museum of the Philippines conducted archaeological excavations in the chamber D of Minori Cave. The 1981 team was able to retrieve a number of artifacts such as chert flake tools, chips, chunks, waste flakes and core as well as andesite flake tools, chips, chunks, cobble tools, waste flakes and earthenware potteries. There were also ecofacts recovered such animal bone fragments and teeth, shells and seeds. Listed below are the faunal remains found in Chamber D of the cave.

National Museum of the Philippines

The National Museum of the Philippines is an umbrella government organization that oversees a number of national museums in the Philippines including ethnographic, anthropological, archaeological and visual arts collections. Since 1998, the National Museum has been the regulatory and enforcement agency of the Government of the Philippines in the restoring and safeguarding of important cultural properties, sites, and reservations throughout the Philippines.

Andesite An intermediate volcanic rock

Andesite ( or ) is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and rhyolite, and ranges from 57 to 63% silicon dioxide (SiO2) as illustrated in TAS diagrams. The mineral assemblage is typically dominated by plagioclase plus pyroxene or hornblende. Magnetite, zircon, apatite, ilmenite, biotite, and garnet are common accessory minerals. Alkali feldspar may be present in minor amounts. The quartz-feldspar abundances in andesite and other volcanic rocks are illustrated in QAPF diagrams.

ClassificationNo. of SpecimensClassificationNo. of Specimens
Cervus sp.281Macaderma s. spasma3
Rodentia483Sus sp.97
Rattus sp.315Carnivora12
Mus sp.3Feloidea2
Macapa sp.15Squamata13
Aves9Varanus sp.2
Bat6Fish1

In chamber A, lithic implements(made of andesite and chert), earthenware and porcelain shreds, animal bone fragments, shells, lead and iron implements were found. According to Orogo(1982: no pagination), "the majority of shreds recovered were body portions of probably a vessel. The distinctive traces and marks on the earthenware were evidence that the earthenware were used for food storage.

1999 Re-excavation of Minori Cave, Chamber D

The Minori Cave's chamber D was re-excavated in the year 1999. This time, the team used a spit system of excavation. Upon the analysis of vertical distribution of the recovered artifacts, two cultural horizons were identified; the uppermost, Cultural Layer II, contained both flakes, tools and ceramics, while Cultural Layer I contained a stratigraphically older assemblage of archaeological materials including stone tools but no ceramics. The team have been able to date a charcoal sample from an upper spit. The date was 4,590 years BP+/- 50. This effectively dated Cultural Layer II to the ceramic period.

Conclusions

The Minori Cave flake samples were analyzed. The morphological attributes of the flakes, the completeness of the flakes, the shapes and scars on the flakes were recorded. The findings on the andesite flakes were then compared to chert flakes. According to the findings, the prehistoric people from the region were utilizing chert flakes regardless of size. The people are maximizing the use of the particular resource(chert), which is not as common as andesite in the area. The prehistoric people who were making and using these flakes in Minori Cave, were probably aware of the efficiency of chert in the form of flake tools. Although many andesite flakes found in the archaeological assemblages in Minori cave, less than half of the total andesite flakes collected displayed polish and striations. Base from the observations, the study of the stone tools (andesite and chert) has proven that the andesite tools were functionally tools, although they may not as efficient as chert flakes. This study is also an evidence that an expedient technology existed and persisted in Minori Cave in Northern Luzon (Philippines), as in the rest of the Southeast Asian region. The practicality of the industries is not due to cultural stagnation, but as an appropriate cultural adaptation by prehistoric people to their environment and its resources. [2]

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Chert A hard, fine-grained sedimentary rock composed of crystals of quartz (silica) that are very small

Chert is a hard, fine-grained sedimentary rock composed of crystals of quartz (silica) that are very small (microcrystalline or cryptocrystalline). Quartz (silica) is the mineral form of silicon dioxide (SiO2). Chert is often of biological origin (organic) but may also occur inorganically as a chemical precipitate or a diagenetic replacement (e.g., petrified wood). Geologists use chert as a generic name for any type of microcrystalline or cryptocrystalline quartz.

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References

  1. Guillermo, Artemio R. (2012). "Historical Dictionary of the Philippines, 3rd edition", pg. 125. Scarecrow Press, Inc., Maryland.
  2. Mijares, A. (2002). The Minori Cave Expedient Lithic Technology. Diliman, Quezon City: University of the Philippines Press.