Taxodiaceous conifers from the Maastrichtian type area (Late Cretaceous, NE Belgium, SE Netherlands)

AbstractThe Late Cretaceous echinoid genus Echinogalerus König, 1825 is remarkably diverse in the Maastrichtian type area (SE Netherlands and adjacent parts of NE Belgium and western Germany). So far, five species have been recognised, namely E. belgicus (Lambert, 1898), E. minutus (Smiser, 1935), E. muelleri (Schlüter, 1902), E. pusillus Lambert, 1911 and E. vetschauensis (Schlüter, 1902), which occur from the base of the Lower Maastrichtian (E. belgicus, E. pusillus, E. muelleri) up to the K/T boundary (E. minutus). Echinogalerus muelleri, which has the longest stratigraphical range, is the most diverse, while E. pusillus is the smallest echinoid in the area, reaching maximum lengths of 4.5 mm. Comparisons with other species of Echinogalerus described in the literature have now led to the recognition of three tentative infrageneric alliances. It is argued that the ordinal position of Echinogalerus (Holectypoida or Cassiduloida) cannot be evaluated as long as many species are still insufficiently known and two genera, from the Maastrichtian of northern Germany and Denmark, intermediate between the two orders, remain undescribed.

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A note on Salenia gr. nutrix Peron and Gauthier, 1881 (Echinoidea) from the Maastrichtian type area (southeastern Netherlands, northeastern Belgium)

Journal of Paleontology ◽

10.1017/s0022336000032479 ◽

1999 ◽

Vol 73 (4) ◽

pp. 663-666 ◽

Cited By ~ 2

Author(s):

John W. M. Jagt ◽

Raymond W. J. M. Van Der Ham ◽

Roland Meuris ◽

Ludo Indeherberge

Keyword(s):

Late Cretaceous ◽

North Africa ◽

Single Specimen ◽

Type Area ◽

The Mediterranean

A single specimen of a saleniid echinoid recently collected from the Late Maastrichtian of the type area of the Maastrichtian Stage is notable in being closely related to Salenia nutrix Peron and Gauthier, 1881. Representatives of the “nutrix group” have previously been recorded from the Late Cretaceous of the Mediterranean and north Africa. The occurrence in the type Maastrichtian of a representative of this group thus furnishes additional evidence of Tethyan incursions in the area during the Late Maastrichtian.

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On the taphonomy of the late Maastrichtian (Late Cretaceous) marine turtle Allopleuron hofmanni

Netherlands Journal of Geosciences – Geologie en Mijnbouw ◽

10.1017/s0016774600001104 ◽

2011 ◽

Vol 90 (2-3) ◽

pp. 187-196 ◽

Cited By ~ 4

Author(s):

R. Janssen ◽

R.R. van Baal ◽

A.S. Schulp

Keyword(s):

Late Cretaceous ◽

Population Characteristics ◽

Marine Turtle ◽

Pectoral Girdle ◽

Marine Turtles ◽

Seagrass Meadows ◽

Type Area

AbstractAn exhaustive screening of public collections containing remains of the latest Cretaceous (late Maastrichtian) marine turtle Allopleuron hofmanni (Gray, 1831) from the type area of the Maastrichtian Stage (southeast Netherlands, northeast Belgium) shows the available material to represent almost exclusively adult individuals. The various skeletal elements are not preserved in proportionally equal abundance, with portions of carapace, pectoral girdle, cranium and mandible overrepresented. These observations can be explained by population characteristics and taphonomic factors. During the late Maastrichtian, while hatchlings and juveniles in all likelihood lived and fed elsewhere, extensive seagrass meadows might have supported a population of only adult marine turtles.

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Bird remains from the Maastrichtian type area (Late Cretaceous)

Netherlands Journal of Geosciences – Geologie en Mijnbouw ◽

10.1017/s0016774600023404 ◽

2008 ◽

Vol 87 (4) ◽

pp. 353-358 ◽

Cited By ~ 6

Author(s):

G.J. Dyke ◽

A.S. Schulp ◽

J.W.M. Jagt

Keyword(s):

Late Cretaceous ◽

Type Area ◽

Cretaceous Period

AbstractRemains of Late Cretaceous birds are rare, which is especially true for Europe and the type area of the Maastrichtian Stage (southeast Netherlands, northeast Belgium) in particular. In the present paper, we record new remains (isolated tarsometatarsus and radius) that document the presence of both enantiornithine and ornithurine birds in the Maastrichtian area. These fossils, although fragmentary, are important in view of their stratigraphic age: all bird remains discovered to date in the Maastricht area are amongst the youngest ’non-modern’ avians known, originating from strata deposited less than 500,000 years prior to the end of the Cretaceous Period.

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A new Tethyan migrant: Cretachlorodius enciensis n. gen., n. sp. (Crustacea, Decapoda), from the Maastrichtian type area

Journal of Paleontology ◽

10.1017/s0022336000023374 ◽

1996 ◽

Vol 70 (2) ◽

pp. 293-296 ◽

Cited By ~ 9

Author(s):

René H. B. Fraaye

Keyword(s):

Late Cretaceous ◽

New Genus ◽

New Taxon ◽

Decapod Crustaceans ◽

New Genus And Species ◽

Type Area

A new genus and species of crab is described from the late Maastrichtian Meerssen Member of the Maastricht Formation at the type area of the Maastrichtian Stage, SE Netherlands. This new taxon could well be the ancestor of the xanthid Prochlorodius-Chlorodiella group and its occurrence provides additional evidence of a late Cretaceous radiation among the decapod crustaceans.

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Tip Top Hill volcanics: Late Cretaceous Kasalka Group rocks hosting Eocene epithermal base- and precious-metal veins at Owen Lake, west-central British Columbia

Canadian Journal of Earth Sciences ◽

10.1139/e92-073 ◽

1992 ◽

Vol 29 (5) ◽

pp. 854-864 ◽

Cited By ~ 7

Author(s):

Craig H. B. Leitch ◽

C. T. Hood ◽

Xiao-Lin Cheng ◽

A. J. Sinclair

Keyword(s):

British Columbia ◽

Late Cretaceous ◽

Upper Cretaceous ◽

Volcanic Rocks ◽

Lake Area ◽

Vein Deposit ◽

Type Area ◽

Lake Formation ◽

Host Rocks ◽

Polymictic Conglomerate

Rocks hosting the Silver Queen epithermal Au–Ag–Zn–Pb–Cu vein deposit near Owen Lake, British Columbia, belong to the Tip Top Hill volcanics. They are lithologically similar to the informally named Upper Cretaceous Kasalka Group rocks exposed in the type area at Tahtsa Lake, 75 km southwest of the deposit, and at Mount Cronin, 100 km northwest of the deposit. The Kasalka Group rocks in the Tahtsa Lake area give questionable dates of 105 ± 5 Ma by K–Ar on whole rock but are cut by intrusions dated at 83.8 ± 2.8 Ma by K–Ar on biotite. The sequence at the Silver Queen deposit includes a polymictic conglomerate, followed upward by felsic fragmental rocks and a thick porphyritic andesite flow and sill unit, cut by microdiorite and quartz–feldspar porphyry intrusions. The porphyritic andesite and the microdiorite have been dated as Late Cretaceous (78.3 ± 2.7 and 78.7 ± 2.7 Ma, respectively, by K–Ar on whole rock), close to previous dates for these rocks (77.1 ± 2.7 and 75.3 ± 2.0 Ma, respectively). The quartz–feldspar porphyry intrudes the porphyritic andesites but has an older U–Pb zircon date of 84.6 ± 0.2 Ma, probably due to underestimation of the true age of the host rocks by the K–Ar whole-rock method. Later dykes correlate with younger volcanic rocks belonging to the Ootsa Lake and Endako groups. Eocene pre- and postmineral plagioclase-rich dykes (51.9 ± 1.8 to 51.3 ± 1.8 Ma) and late diabase dykes (50.4 ± 1.8 Ma; all by K–Ar on whole rock) may be correlative with trachyandesite volcanics of the Goosly Lake Formation, part of the Eocene Endako Group. These volcanics have been dated elsewhere at 55.6 ± 2.5 to 48.8 ± 1.8 Ma by K–Ar on whole rock and biotite, respectively. Mineralization at Silver Queen is therefore similar in age to, but slightly younger than, the producing Equity mine located 30 km to the northeast, which is estimated at 58.5 ± 2.0 Ma by K–Ar on whole rock.

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Silicified otoliths from the Maastrichtian type area (Netherlands, Belgium) document early gadiform and perciform fishes during the Late Cretaceous, prior to the K/Pg boundary extinction event

Cretaceous Research ◽

10.1016/j.cretres.2021.104921 ◽

2021 ◽

pp. 104921

Author(s):

Werner W. Schwarzhans ◽

John W.M. Jagt

Keyword(s):

Late Cretaceous ◽

Type Area ◽

Extinction Event

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Stable isotopes, niche partitioning and the paucity of elasmosaur remains in the Maastrichtian type area

Netherlands Journal of Geosciences – Geologie en Mijnbouw ◽

10.1017/njg.2016.20 ◽

2016 ◽

Vol 96 (1) ◽

pp. 29-33 ◽

Cited By ~ 2

Author(s):

Anne S. Schulp ◽

Renée Janssen ◽

Remy R. van Baal ◽

John W.M. Jagt ◽

Eric W.A. Mulder ◽

...

Keyword(s):

Stable Isotopes ◽

Stable Isotope ◽

Late Cretaceous ◽

Trophic Level ◽

Tooth Enamel ◽

Niche Partitioning ◽

Skeletal Remains ◽

Diving Behaviour ◽

Foraging Area ◽

Type Area

AbstractRemains of elasmosaurid plesiosaurs are exceedingly rare in the type-Maastrichtian strata (Late Cretaceous, southeast Netherlands and northeast Belgium), in stark contrast to relatively common skeletal remains of mosasaurs. Here, we present an analysis of δ13C stable isotope values for tooth enamel of two elasmosaur teeth from the type Maastrichtian. The δ13C signal is a proxy for foraging area, trophic level and diving behaviour, the net value of which in these rare elasmosaurs turns out to be not noticeably different from that for the much commoner mosasaurs in the type Maastrichtian. Therefore, the rarity of elasmosaurs in the area probably reflects a primary near-absence of such reptiles during the latest Cretaceous, rather than a taphonomic artefact.

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