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Basic information Name: Ponggo
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, confirmed fall
Year fell: 2022
Country: Philippines
Mass:help 2.4 kg
Meteoritical Bulletin:  MB 111  (2023)  H3-5
Recommended:  H3-5    [explanation]

This is 1 of 86 approved meteorites classified as H3-5.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 10 Dec 2022
Writeup from MB 111:

Ponggo        16°13’00.7"N, 121°36’26.2"E

Cagayan Valley, Philippines

Fall: 20 May 2022

Classification: Ordinary chondrite (H3-5)

History: (Mar Christian V. Cruz, Ramon A. Santiago, David Joshua F. Magno, Allen L. Yu) On May 20, 2022, at around 04:00 p.m. local time (08:00 a.m. UTC), a house situated in the northeastern province of the Philippines at 16°13’00.7"N, 121°36’26.2"E (Barangay Ponggo, Municipality of Nagtipunan, Province of Quirino, Cagayan Valley, Philippines) was struck by a 2.4-kg stone that had a roughly east-to-west atmospheric trajectory. The meteorite first crashed through the two layers of roof before smashing a plastic plant pot into pieces and creating a palm-sized dent/crater on the concrete floor. According to the anonymous finder, he did not touch the stone right after it landed because it seemed to be too hot. A few " after the impact, the people within the vicinity heard three consecutive sonic booms. No smoke trail was observed. Due to its violent impact, a number of fragments were broken off the main mass. The scattered pieces, mixed with the soil from the pot, were collected using a magnet; and some of these fragments were given out to the relatives of the finder. After nearly a week, when the news of the fall spread across the online meteorite community, Ramon Apostol Santiago and Mar Christian Velasquez Cruz, Filipino meteorite collectors, contacted the finder to acquire some fragments. On May 25, 2022, Ramon obtained a 3.7-g fragment from the brother of the finder, who brought the specimen to Manila. Subsequently, Christian acquired 4 fragments, with a total mass of 17.71 g, from Edwin Nocillado Cantuangco, the uncle of the finder. One of these fragments, weighing 4 g, is the largest among the pieces deposited at Cascadia as type specimens. Through the collective efforts of Allen Lui Yu, Mar Christian Velasquez Cruz, David Joshua Floriza Magno, and Ramon Apostol Santiago, with the approval of the National Commission for Culture and the Arts (NCCA), the 21.5-g lot specimen was exported for classification and registration by Cascadia. The main mass was sold to an anonymous meteorite dealer.

Physical characteristics: Physical Characteristics: (M. Hutson): Cascadia received 32 small fragments, 12 of which were ~1 cm across. The material is mainly light-to-medium gray with easily discerned light and dark chondrules and abundant metal grains. Three of the fragments contained lighter colored clasts lacking visible chondrules; one of these fragments was used to make a thin section for classification. Several fragments had attached matte black fusion crust. Three samples had shiny slickensides on one face, and two samples had large rounded white igneous-textured inclusions.

Petrography: (M. Hutson and D. Sheikh, Cascadia): Abundant chondrules and chondrule fragments are readily discerned in thin section. A concentration of chondrules rimmed by sulfide and metal occurs in the center of the section, differing texturally from the surrounding material, although no obvious clast boundary is observed. Chondrule mesostases throughout all of the section, with the exception of a single readily discerned clast ~4 × 2 mm in area, is glassy and crystallite-filled. The single clast has a well-integrated texture with barely discernable chondrules and chondrule fragments. All plagioclase feldspar grains observed in this clast are <50 µm across.

Geochemistry: (M. Hutson, D. Sheikh, Cascadia; A. Love, App): The majority of host olivine (34 out of 49 analyses) and pyroxene (28 out of 38 analyses) data were obtained at Cascadia, with the rest obtained at App. The fayalite content of olivine for both sets of host data were identical (Fa18.0), and the combined data is reported. Host: Olivine: Fa18.0±5.4 (N=49); low-Ca pyroxene: Fs12.7±5.4Wo1.0±0.6 (N=38). Clast data was obtained at App. Clast: Olivine Fa18.2±0.3 (N=21); low-Ca pyroxene Fs15.9±0.2Wo1.4±0.1 (N=18).

Classification: Ordinary chondrite (H3-5), based on chemistry and texture.

Specimens: Cascadia received 21.5 g of material, and after sectioning, holds 19.5 g in 31 pieces, as well as a polished thin section and material in an epoxy butt. Fragments from the main mass were acquired by Mar Christian V. Cruz (13.68 g), Ramon A. Santiago (8.20 g), Allen L. Yu (1.85 g), and David Joshua F. Magno (1.02 g). The main mass is held by an anonymous meteorite dealer.

Data from:
  Table 0
  Line 0:
State/Prov/County:Cagayan Valley
Date:20 May 2022
Mass (g):2400
Shock stage:S2
Weathering grade:W0
Fayalite (mol%):18.0±5.4 (N=49)
Ferrosilite (mol%):12.7±5.4 (N=38)
Wollastonite (mol%):1.0±0.6 (N=38)
Classifier:M. Hutson and D. Sheikh, Cascadia; A. Love, App
Type spec mass (g):21.5
Type spec location:Cascadia
Main mass:anonymous
Comments:Lab number CML 1219; submitted by Melinda Hutson
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mar Christian Cruz   
Public domain photographs:
Melinda Hutson      

     Recommended::   (16° 13' 1"N, 121° 36' 26"E)

     This is the only approved meteorite from Cagayan Valley, Philippines
     This is 1 of 7 approved meteorites from Philippines
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