San Angelo Formation

San Angelo Formation
Stratigraphic range: Kungurian
TypeFormation
Unit ofPease River Group
UnderliesBlaine Formation
OverliesClear Fork Group
Location
RegionTexas
CountryUnited States

The San Angelo Formation is a geologic formation in Texas. It preserves fossils dating back to the Permian period. Along with the Chickasha Formation is one of the two geologically youngest formations in North America to preserve fossils of caseids, and it is the youngest one to preserve remains of undoubted sphenacodontids, namely, Dimetrodon angelensis.[1][2]

Stratigraphy and age

Some studies argued that the San Angelo Formation belongs to the Kungurian stage of the Cisuralian series because it underlies the Blaine Formation, which is, according to the same studies, either upper Kungurian or lower Guadalupian.[3][4] However, a recent study concluded that Olson was correct in regarding the San Angelo Formation as belonging to the Roadian, and that the Blaine Formation also dates from the Roadian.[2]

Fossil content

Everett C. Olson regarded the San Angelo Formation as preserving some of the oldest known therapsids, several of which he classified in a taxon he called Eotheriodonta.[1] These taxa are now interpreted as caseids and sphenacodontids, not therapsids.[5]

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Synapsids

Genus Species Location Material Notes Images
Angelosaurus A. dolani A caseid
Caseoides C. sanangeloensis A caseid
Caseopsis C. agilis A caseid
Cotylorhynchus C. hancocki A caseid
Dimacrodon D. hottoni
Dimetrodon D. angelensis A sphenacodontid
Driveria D. ponderosa
Eosyodon E. hudsoni A dubious sphenacodontid[6]
Gorgodon G. minutus
Knoxosaurus K. niteckii
Mastersonia M. driverensis
Tappenosaurus T. magnus

See also

References

  1. ^ a b Olson 1962.
  2. ^ a b Laurin, Michel; Hook, Robert W. (2022). "The age of North America's youngest Paleozoic continental vertebrates: a review of data from the Middle Permian Pease River (Texas) and El Reno (Oklahoma) Groups". BSGF - Earth Sciences Bulletin. 193: 10. doi:10.1051/bsgf/2022007.
  3. ^ DiMichele et al. 2001.
  4. ^ Lucas & Golubev 2019.
  5. ^ Sidor & Hopson 1995.
  6. ^ Kammerer 2011, p. 291.

Bibliography

  • DiMichele, William A.; Mamay, Sergius H.; Chaney, Dan S.; Hook, Robert W.; Nelson, W. John (2001). "An Early Permian flora with Late Permian and Mesozoic affinities from North-Central Texas". Journal of Paleontology. 75 (2): 12.
  • Kammerer, Christian F. (2011). "Systematics of the Anteosauria (Therapsida: Dinocephalia)". Journal of Systematic Palaeontology. 9 (2): 261–304. doi:10.1080/14772019.2010.492645. ISSN 1477-2019.
  • Lucas, Spencer G; Golubev, Valeriy K (2019). "Age and duration of Olson's Gap, a global hiatus in the Permian tetrapod fossil record". Permophiles: 5.
  • Olson, Everett C. (1962). "Late Permian Terrestrial Vertebrates, U. S. A. and U. S. S. R." Transactions of the American Philosophical Society. 52 (2): 1–224. doi:10.2307/1005904. ISSN 0065-9746. JSTOR 1005904.
  • Olson, Everett C.; Beerbower, James R. (1953). "The San Angelo Formation, Permian of Texas, and Its Vertebrates". The Journal of Geology. 61 (5): 389–423. doi:10.1086/626109. ISSN 0022-1376. JSTOR 30079693.
  • Sidor, C. A.; Hopson, J. A. (1995). "The taxonomic status of the Upper Permian eotheriodont therapsids of the San Angelo Formation (Guadalupian), Texas". Journal of Vertebrate Paleontology. 15 (3A): 53A.


Stub icon

This article about a specific stratigraphic formation in Texas is a stub. You can help Wikipedia by expanding it.

Stub icon

This article related to the Permian period is a stub. You can help Wikipedia by expanding it.

Read other articles:

Budi Yuono

Kolonel Inf. Budi Yuono adalah seorang perwira menengah TNI AD yang saat ini bertugas sebagai Irut II/Minlat Itlatitum Itjenad. Budi Yuono merupakan alumni Akademi Militer 1995 yang mahir dalam kecabangan Infanteri dan terakhir bertugas sebagai Komandan Kodim 0832/Surabaya Selatan.Budi Yuono Irut II/Minlat Itlatitum ItjenadPetahanaMulai menjabat 28 Oktober 2021Komandan Kodim 0832/Surabaya SelatanMasa jabatan30 Juni 2020 – 28 Oktober 2021 PendahuluKolonel Inf. Moch Sjamsul Arief...

 

Battle of Galați

Battle of GalațiPart of the Romanian Campaign of World War Iand the Russian Civil WarMonument commemorating the Battle of Galați, photo from 1921Date12–22 January 1918LocationGalați, Kingdom of RomaniaResult Romanian victory: Russian troops disarmedBelligerents  Romania  Russian RepublicCommanders and leaders Constantin Prezan Constantin Niculescu-Rizea Dmitry Shcherbachev  Yevgeni Iskritsky Strength 500 troops 12,000 troopsCasualties and losses Unknown Unknown, but R...

 

KRI Teluk Wondama (527)

KRI Teluk Wondama dan KRI Teluk Weda Karier (ID) Dipesan2019ProduksiPT Bandar Abadi Mulai dibuat 19 Des 2019 Diluncurkan 3 Maret 2021 Harga Unit - Dibeli2019 Status diluncurkan[1] Karakteristik umum Berat benaman 5200 ton Panjang 120 meter (393,70 ft) Lebar 13 meter (42,65 ft) Draft3 meter (9,84 ft)Tenaga penggerakmesin diesel 2 x STX MAN 9L27 / 38 Kecepatan maksimum 16 knot Jarak tempuh7200 km Awak kapal 116 ABK 6 awak helikopter 367 pasukan Persenjataan2 x helikopter...

I Feel

I FeelSampul digitalAlbum mini karya (G)I-dleDirilis15 Mei 2023 (2023-05-15)StudioCube StudiosGenrePopDurasi17:03BahasaKoreaInggrisLabel Cube Kakao Kronologi (G)I-dle I Love(2022) I Feel(2023) Heat(2023) Sampul edisi fisikVersi Butterfly, Queen dan Cat, dari kiri ke kanan Singel dalam album I Feel QueencardDirilis: 15 Mei 2023 I Feel adalah album mini berbahasa Korea keenam (kedelapan secara keseluruhan) oleh grup vokal wanita Korea Selatan (G)I-dle. Album ini dirilis oleh Cube Enter...

 

1980 United States presidential election in Michigan

Election in Michigan Main article: 1980 United States presidential election 1980 United States presidential election in Michigan ← 1976 November 4, 1980 1984 → All 21 Michigan votes to the Electoral CollegeTurnout61.1% [1]   Nominee Ronald Reagan Jimmy Carter John B. Anderson Party Republican Democratic Anderson Coalition [a] Home state California Georgia Illinois Running mate George H. W. Bush Walter Mondale Patrick Lucey Electoral vo...

 

Basket interference

Rule in basketball In basketball, basket interference is the violation of (a) touching the ball or any part of the basket (including the net) while the ball is on the rim of the basket, (b) touching the ball when it is entirely within the cylinder extending upwards from the rim, (c) reaching up through the basket from below and touching the ball, whether it is inside or outside the cylinder, or (d) pulling down on the rim of the basket so that it contacts the ball before returning to its orig...

Ministri del turismo e dello spettacolo della Repubblica Italiana

Voce principale: Ministero del turismo e dello spettacolo. I ministri del turismo e dello spettacolo della Repubblica Italiana si sono avvicendati dal 1959 al 1994, quando il dicastero fu soppresso a seguito dell'esito favorevole di un referendum abrogativo. Le sue funzioni furono trasferite a due appositi dipartimenti della Presidenza del Consiglio: il dipartimento del turismo e il dipartimento dello spettacolo, per i cui ulteriori sviluppi amministrativi si rimanda ai rispettivi articoli. ...

 

Kodaikanal International School

Independent school, residential school in Kodaikanal, Tamil Nadu, IndiaKodaikanal International SchoolAddressPO Box 25, Seven Roads JunctionKodaikanal, Tamil Nadu 624 101IndiaCoordinates10°14′7″N 77°29′21″E / 10.23528°N 77.48917°E / 10.23528; 77.48917InformationTypeIndependent School, Residential SchoolMottoUnity in DiversityReligious affiliation(s)Christian [1]Established1901FounderMargaret EddyChairpersonOlinda TimmsDeanRavichandran BalarajuPrinc...

 

Новотитаровское сельское поселение

Сельское поселение России (МО 2-го уровня)Новотитаровское сельское поселение Флаг[d] Герб 45°14′09″ с. ш. 38°58′16″ в. д.HGЯO Страна  Россия Субъект РФ Краснодарский край Район Динской Включает 4 населённых пункта Адм. центр Новотитаровская Глава сельского пос�...

Paris Hilton

American media personality (born 1981) Not to be confused with Perez Hilton. Paris HiltonHilton in October 2021BornParis Whitney Hilton (1981-02-17) February 17, 1981 (age 43)New York City, U.S.OccupationsMedia personalitybusinesswomansocialiteYears active1996–presentWorksListSpouse Carter Reum ​(m. 2021)​Children2Parent(s)Richard HiltonKathy HiltonRelativesHilton familyMusical careerGenres Pop[1] hip hop dance[2] Instrument(s)VocalsLab...

 

1912 United States presidential election in Oregon

Election in Oregon Main article: 1912 United States presidential election 1912 United States presidential election in Oregon ← 1908 November 5, 1912 1916 →   Nominee Woodrow Wilson Theodore Roosevelt Party Democratic Progressive Home state New Jersey New York Running mate Thomas R. Marshall Hiram Johnson Electoral vote 5 0 Popular vote 47,064 37,600 Percentage 34.34% 27.44%   Nominee William Howard Taft Eugene V. Debs Party Republican Social...

 

Claisen condensation

Chemical reaction Not to be confused with Claisen rearrangement or Claisen–Schmidt condensation. Claisen condensation Named after Rainer Ludwig Claisen Reaction type Condensation reaction Reaction R-COO-R′ + R-COO-R′ or Carbonyl + (Base: Na-OR') ↓ β-keto ester + R'-OH Conditions Typical solvents R'-OH Identifiers Organic Chemistry Portal claisen-condensation RSC ontology ID RXNO:0000043 The Claisen condensation is a carbon–carbon bond forming reaction that occurs between two esters...

2020 Butler Bulldogs football team

American college football season 2020 Butler Bulldogs footballConferencePioneer Football LeagueRecord0–6 (0–6 PFL)Head coachJeff Voris (15th season)Home stadiumBud and Jackie Sellick BowlSeasons← 20192021 → 2020 Pioneer Football League standings vte Conf Overall Team   W   L     W   L   Davidson $^   4 – 1     4 – 2   Valparaiso   4 – 2     4 – 2   San Diego  ...

 

乔冠华

乔冠华 中华人民共和国外交部部长 中国人民对外友好协会顾问 任期1974年11月—1976年12月总理周恩来 → 华国锋前任姬鹏飞继任黄华 个人资料性别男出生(1913-03-28)1913年3月28日 中華民國江蘇省盐城县逝世1983年9月22日(1983歲—09—22)（70歲） 中华人民共和国北京市籍贯江蘇鹽城国籍 中华人民共和国政党 中国共产党配偶明仁（1940年病逝） 龚澎（1970年病逝） 章含�...

 

9-та парашутна дивізія (Третій Рейх)

9-та парашутна дивізія 9. Fallschirmjäger-Division Емблема 9-ї парашутної дивізіїНа службі 24 вересня 1944 — 2 травня 1945Країна  Третій РейхНалежність  ВермахтВид  ЛюфтваффеТип повітряно-десантні військаЧисельність повітряно-десантна дивізіяУ складі 2-й армійський корпус11...

Basilica della Natività

Basilica della NativitàStato Palestina LocalitàBetlemme Coordinate31°42′15.5″N 35°12′27.3″E31°42′15.5″N, 35°12′27.3″E Religione greco-ortodossa cattolica armena Titolarenascita di Gesù Diocesi Patriarcato greco-ortodosso di Gerusalemme Patriarcato di Gerusalemme dei Latini Patriarcato armeno di Gerusalemme Stile architettonicopaleocristiano e romanico Sito webwww.custodia.org/it/santuari/betlemme Modifica dati su Wikidata · Manuale  Bene protetto dall'UN...

 

Montreux Jazz Festival

Music festival in Switzerland This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Montreux Jazz Festival – news · newspapers · books · scholar · JSTOR (February 2014) (Learn how and when to remove this message) Not to be confused with Montreal International Jazz Festival. Montreux Festival redirects here. For th...

 

Orbit (dynamics)

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (February 2013) (Learn how and when to remove this message) This article is about orbits in dynamical systems theory. For other uses, see Orbit (disambiguation). In mathematics, specifically in the study of dynamical systems, an orbit is a collection of points related by the evo...

Mauro Rostagno

Mauro Rostagno Mauro Rostagno (Torino, 6 marzo 1942 – Lenzi di Valderice, 26 settembre 1988) è stato un sociologo, giornalista e attivista italiano.[1] È stato uno dei fondatori del movimento politico Lotta Continua e della comunità socioterapeutica Saman, inizialmente ispirata al movimento di Osho Rajneesh. Venne assassinato in Sicilia da Cosa nostra;[2][3] dopo l'omicidio del magistrato Antonino Saetta.[4] Sul luogo dell'agguato è stato posizionato un m...

 

Сципио дель Кампо, Юзеф

Юзеф Сципио дель Кампо Староста лидский 1720 — 1743 Предшественник Ян Сципио дель Кампо Преемник Игнацы Сципио дель Кампо Маршалок надворный литовский 1739 — 1743 Предшественник Фердинанд Плятер Преемник Игнацы Огинский Рождение 1710 Смерть до 9 июня 1743Щучин, Лидский повет...