Maastricht Formation
{{Short description|Geological formation in the Netherlands and Belgium}}
{{Infobox rockunit
| name = Maastricht Formation
| image = Kalksteengroeve Midweg.jpg
| caption = Old stone quarry at Kunrade, where the Kunrade Member of the Maastricht Formation outcrops
| type = Geological formation
| age = {{Fossil range|72|61|Maastrichtian–Danian}}
| period = Maastrichtian
| prilithology = Chalk
| otherlithology = Marl, flint
| namedfor = Maastricht
| namedby = Dumont
| year_ts = 1849
| region = Europe
| country = Netherlands
Belgium
| coordinates =
| unitof =
| subunits = Meerssen Member, Nekum Member, Emael Member, Schiepersberg Member, Gronsveld Member, Valkenburg Member and Kunrade Member
| underlies = Houthem Formation
| overlies = Gulpen Formation
| thickness = {{convert|30|-|90|m|ft|abbr=on}}
| extent =
| area =
| map =
| map_caption =
}}
The Maastricht Formation (Dutch: Formatie van Maastricht; abbreviation: MMa), named after the city of Maastricht in the Netherlands, is a geological formation in the Netherlands and Belgium whose strata date back to the Late Cretaceous, within 500,000 years of the Cretaceous–Paleogene boundary,{{cite journal | last1 = Longrich | first1 = N.R. | last2 = Tokaryk | first2 = T. | last3 = Field | first3 = D.J. | year = 2011 | title = Mass extinction of birds at the Cretaceous–Paleogene (K–Pg) boundary | journal = Proceedings of the National Academy of Sciences | volume = 108 | issue = 37| pages = 15253–15257 | doi = 10.1073/pnas.1110395108 | pmid=21914849 | pmc=3174646| bibcode = 2011PNAS..10815253L | doi-access = free }} now dated at {{ma|Paleocene| million years ago}}. The formation is part of the Chalk Group and is between {{convert|30|and|90|m|ft}} thick. It crops out in southern parts of Dutch and Belgian Limburg and adjacent areas in Germany. It can be found in the subsurface of northern Belgium and southeastern Netherlands, especially in the Campine Basin and Roer Valley Graben. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, Europe)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 588-593. {{ISBN|0-520-24209-2}}.
Lithology
The Maastricht Formation consists of soft, sandy shallow marine limestone (in Limburg locally called "mergel"), in fact chalk and calcareous arenite. These lithologies locally alternate with thin bands of marl or clay. The lower parts of the formation contain flint concretions. The upper parts can have shellrich layers. Its age is between about 70 and 66 million years, which puts it in the Maastrichtian, a stage that was named after the formation. The top of the formation has been identified as Danian (early Paleocene) in age.{{aut|Vellekoop, J., Van Tilborgh, K.H., Van Knippenberg, P., Jagt, J.W.M., Stassen, P., Goolaerts, S. and Speijer, R.P.}} (2020), Type‐Maastrichtian gastropod faunas show rapid ecosystem recovery following the Cretaceous–Palaeogene boundary catastrophe. Palaeontology, 63: 349-367. doi:10.1111/pala.12462{{aut|John W.M. Jagt, Werner M. Felder, Rudi W. Dortangs & Jacques Severijns}} (1996) The Cretaceous/Tertiary boundary in the Maastrichtian type area (SE Netherlands, NE Belgium); a historical account, Geologie en Mijnbouw 75: 107-118 The type locality is at the ruins of Lichtenberg castle on Mount Saint Peter, Maastricht.
Stratigraphy
The Maastricht Formation was first described by Belgian geologist André Dumont in 1849. The formation is subdivided in seven members, from top to bottom these are the Meerssen Member, Nekum Member, Emael Member, Schiepersberg Member, Gronsveld Member, Valkenburg Member and Kunrade Member. The members are often hard to distinguish.See for example: [http://www.fossiel.net/research/report2/stratenci.php Stratigraphy of the ENCI quarry], by H. Zevenberg
The Maastricht Formation is overlain by the Paleocene Houthem Formation and was deposited on top of the older Gulpen Formation.
Vertebrate paleofauna
= Dinosaurs =
{{paleobiota-key-compact}}
| class="wikitable" align="center" width="100%" |
| colspan="7" align="center" |Dinosaurs reported from the Maastricht Formation |
|---|
| Genus
! Species ! Location ! Stratigraphic position ! Material ! Notes ! Images |
| Asteriornis
| | | Limb bones and a mostly complete skull | A stem-Galloanserae |
| Betasuchus
|B. bredai | Geographically present in the Dutch province of Limburg. | |"Femur.""Table 4.1," in Weishampel, et al. (2004). Page 78. |An abelisauroid. |
| Janavis
| | | | An ichthyornithine | |
| style="background:#f3e9f3;" | |style="background:#fbdddb;" |M. bredai |style="background:#fbdddb;" |Geographically present in the Dutch province of Limburg. |style="background:#fbdddb;" | |style="background:#fbdddb;" | |style="background:#fbdddb;" |Reclassified as Betasuchus bredai. |style="background:#fbdddb;" | |
| style="background:#E6E6E6;" |Orthomerus
|style="background:#E6E6E6;" |O. dolloi |style="background:#E6E6E6;" |Geographically present in the Dutch and Belgian provinces of Limburg. |style="background:#E6E6E6;" | |style="background:#E6E6E6;" | |style="background:#E6E6E6;" |A dubious hadrosaurid. |style="background:#E6E6E6;" |200px |
| Indeterminate euhadrosaurian remains
| |Geographically present in the Dutch province of Limburg. | | |A hadrosauroid. | |
| "Unnamed ornithurine"
|Unnamed | | | |An ornithurine.{{cite journal | last1 = Dyke | first1 = G.J. | last2 = Schulp | first2 = A.S. | last3 = Jagt | first3 = J.W.M. | title = Bird remains from the Maastrichtian type area (Late Cretaceous) | date = 2008 | journal = Netherlands Journal of Geosciences | volume = 87 | issue = 4 | pages = 353–358 | doi = 10.1017/S0016774600023404| doi-access = free }} | |
| "Unnamed enantiornithine"
|Unnamed | | | |An enantiornithine. | |
= Mammals =
{{paleobiota-key-compact}}
| class="wikitable" align="center" width="100%" |
| colspan="7" align="center" |Mammals reported from the Maastricht Formation |
|---|
| Genus
! Species ! Location ! Stratigraphic position ! Material ! Notes ! Images |
| Maastrichtidelphys
| M. meurismeti |Geographically present in the Dutch province of Limburg. | | "Right upper molar." | A herpetotheriid marsupial.{{cite journal | title = A New European Marsupial Indicates a Late Cretaceous High-Latitude Transatlantic Dispersal Route. | first1 = J. | last1 = Martin | first2 = J. | last2 = Case | first3 = J.W.M. | last3 = Jagt | first4 = A.S. | last4 = Schulp | first5 = E. | last5 = Mulder. | journal = Journal of Mammalian Evolution | volume = 12 | issue = 3 | pages = 495–511 | date = 2005 | doi = 10.1007/s10914-005-7330-x| s2cid = 39202343 }} |rowspan="99" | |
= Mosasaurs =
{{More citations needed section|date=September 2016}}
{{paleobiota-key-compact}}
| class="wikitable" align="center" width="100%" |
| colspan="7" align="center" |Mosasaurs reported from the Maastricht Formation |
|---|
| Genus
! Species ! Location ! Stratigraphic position ! Material ! Notes ! Images |
| rowspan="2"|
| C. belgicus | | | | |
| style="background:#E6E6E6;" |
C. fraasi |style="background:#E6E6E6;" | |style="background:#E6E6E6;" | |style="background:#E6E6E6;" | |style="background:#E6E6E6;" | Junior synonym of C. belgicus. | rowspan=2 | |
| style="background:#f3e9f3;" |
|style="background:#E6E6E6;" | G. fraasi |style="background:#E6E6E6;" | |style="background:#E6E6E6;" | |style="background:#E6E6E6;" | |style="background:#E6E6E6;" | Reclassified as Carinodens fraasi |
| rowspan="2"|
| M. hoffmannii | | | | Holotype |
| M. lemonnieri
| | | | | |
| Plioplatecarpus
| P. marshi | | | | |
| rowspan="2"|Prognathodon
|P.? saturator | | | | | |
| P.? sectorius
| | | | |
= Testudines =
{{paleobiota-key-compact}}
= Bony fish =
Invertebrate paleofauna
| class="wikitable" align="center" width="100%" |
| colspan="7" align="center" |Invertebrates reported from the Maastricht Formation |
|---|
| Genus
! Species ! Location ! Stratigraphic position ! Material ! Notes ! Images |
| Maastrichtiocaris{{Cite journal |last=Fraaije |first=René H. B. |last2=Schram |first2=Frederick R. |last3=Vonk |first3=Ronald |date=March 2003 |title=Maastrichtiocaris rostratus new genus and species, the first Cretaceous cycloid |url=https://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/maastrichtiocaris-rostratus-new-genus-and-species-the-first-cretaceous-cycloid/B120881E6DAFEFF333003E49C0639CAE |journal=Journal of Paleontology |language=en |volume=77 |issue=2 |pages=386–388 |doi=10.1666/0022-3360(2003)077<0386:MRNGAS>2.0.CO;2 |issn=0022-3360}}
| M. rostratus | |Middle Meerssen Member |Carapace |A cyclidan crustcean, youngest member of the group, has also alternatively been suggested to be a crab. | |
See also
{{commons category}}
- List of dinosaur-bearing rock formations
- {{wiktionary-inline}}
References
{{Reflist}}
{{DEFAULTSORT:Maastricht}}
Category:Geologic formations of the Netherlands
Category:Geologic formations of Belgium
Category:Upper Cretaceous Series of Europe
Category:Cretaceous Netherlands
Category:Cretaceous–Paleogene boundary
Category:Paleocene Series of Europe
Category:Paleogene Netherlands
Category:Fossiliferous stratigraphic units of Europe