Cretaceous Deposits in the Musquodoboit River Valley Nova Scotia

1971 ◽  
Vol 8 (9) ◽  
pp. 1152-1154 ◽  
Author(s):  
Chang L. Lin
Keyword(s):  
Nova Scotia ◽  
Early Cretaceous ◽  
Drainage System ◽  
River Valley ◽  
Tributary Stream ◽  
Available Information ◽  
Cretaceous Deposits

Two carbonaceous samples recovered from pre-Pleistocene unconsolidated deposits in a borehole at Elmsvale, Musquodoboit River Valley, Nova Scotia, were dated as Early Cretaceous in age. The thickness of the deposit encountered was 551 ft (168 m). Available information suggests that the upper segment of the present Musquodoboit River was a tributary-stream of the Shubenacadie drainage system.

Source and Origin of Roxana Silt and Middle Wisconsinan Midcontinent Glacial Activity

1989 ◽  
Vol 31 (3) ◽  
pp. 319-331 ◽  
Author(s):  
W. Hilton Johnson ◽  
Leon R. Follmer
Keyword(s):  
Mississippi River ◽  
Lake Michigan ◽  
Drainage System ◽  
River Valley ◽  
Upper Mississippi River ◽  
Upper Great Lakes ◽  
Mississippi River Valley ◽  
Depositional System ◽  
Stratigraphic Position ◽  
Late Wisconsinan

AbstractThick Roxana Silt (middle Wisconsinan) in central and southwestern Illinois traditionally has been interpreted as loess derived from valley-train deposits in the ancient Mississippi River valley. Winters et al. (H. A. Winters, J. J. Alford, and R. L. Rieck, Quaternary Research 29, 25–35, 1988) recently suggested that the Roxana was not directly related to glacial activity, but was derived from sediment produced by increased shoreline and spillway erosion associated with a fluctuating ancestral Lake Michigan. Because (1) paleoenvironmental and paleohydrologic conditions inferred in the hypothesis are unlikely for a loess depositional system and (2) loess did not accumulate during late Wisconsinan deglaciation under conditions similar to those hypothesized, we suggest the hypothesis should be rejected. Roxana distribution suggests the major source was drainage from the upper Mississippi River valley, and variations in loess thickness in Illinois can be explained by consideration of valley width, depth, orientation, and postdepositional erosion. Tills in the headwaters region of the ancient Mississippi drainage system in Minnesota and Wisconsin occur in the appropriate stratigraphic position and have colors and mineralogic compositions that suggest they could be the parent till of the Roxana. We believe a valley-train source for thick Roxana is most probable and urge continued consideration of middle Wisconsinan glaciation in the upper Great Lakes area.

Early Cretaceous sediment failure in the southwestern Sable Subbasin, offshore Nova Scotia

AAPG Bulletin ◽  
2004 ◽  
Vol 88 (7) ◽  
pp. 991-1006 ◽  
Author(s):  
David J. W. Piper ◽  
Georgia Pe-Piper ◽  
Stephen C. Ingram
Keyword(s):  
Nova Scotia ◽  
Early Cretaceous ◽  
Sediment Failure ◽  
Cretaceous Sediment

Redescription of †Yanosteus longidorsalis Jin et al., (Chondrostei, Acipenseriformes, †Peipiaosteidae) from the Early Cretaceous of China

2020 ◽  
Vol 95 (1) ◽  
pp. 170-183
Author(s):  
Eric J. Hilton ◽  
Lance Grande ◽  
Fan Jin
Keyword(s):  
Early Cretaceous ◽  
Late Jurassic ◽  
Monotypic Genus ◽  
Pectoral Fin ◽  
Caudal Fin ◽  
Anterior Process ◽  
Dorsal Fin ◽  
The Family ◽  
Fin Rays ◽  
Cretaceous Deposits

AbstractThe family †Peipiaosteidae contains the genera †Peipiaosteus, †Stichopterus, †Spherosteus, †Yanosteus, and †Liaosteus, all from Late Jurassic to Early Cretaceous deposits of China, Russia, Kazakhstan, and Mongolia. Although the family has taxonomically expanded since it was first established for †P. pani Liu and Zhou, 1965, the amount of detailed comparative data for many of the taxa involved is lacking. In this paper, we describe the osteology of the monotypic genus †Yanosteus from the Yixian Formation (Early Cretaceous) of China largely on the basis of a newly prepared, well-preserved specimen. †Yanosteus is characterized by a series of infraorbital ossicles (a characteristic of the family), a broad, rounded palatopterygoid, a robust dentary, an extremely small opercle and a subopercle with distinctly long and rounded anterior process and a posteriorly scalloped margin, a broad and weakly forked caudal fin, an elongate dorsal fin with more than 160–178 fin rays (diagnostic for the genus), and a short but well-formed pectoral fin spine. We use the results of this study to discuss the characters of the †Peipiaosteioidei and the diversity of †peipiaosteioids.

The Envymaam floristic assemblage from the Upper Cretaceous deposits of the Okhotsk-Chukotka volcanogenic belt

Palaeobotany ◽  
2014 ◽  
Vol 5 ◽  
pp. 42-59 ◽  
Author(s):  
L. B. Golovneva ◽  
S. V. Shczepetov
Keyword(s):  
River Basin ◽  
Early Cretaceous ◽  
Upper Cretaceous ◽  
Isotopic Data ◽  
Basaltic Rocks ◽  
Volcanogenic Belt ◽  
The Poor ◽  
Palynological Assemblages ◽  
Systematic Composition ◽  
Cretaceous Deposits

The Envymaam floristic assemblage occurs from basaltic rocks of the Envymaam Formation in the Envymaam River basin, Central Chukotka segment of the Okhotsk-Chukotka volcanogenic belt. This assemblage consists of 18 taxa: Hepaticites sp., Coniopteris tschuktschorum (Krysht.) Samyl., Phoenicopsis ex gr. angustifolia Heer, Cupressinocladus enmyvaamensis Golovn., sp. nov., Araliaephyllum philippoviae Golovn., sp. nov. Among them, two species are fi rstly described. The Envymaam assemblage is characterized by presence of the Early Cretaceous relicts (Phoenicopsis), by rarity of angiosperms and by small sizes of their leaves. Age of the Envymaam floristic assemblage is determined as the late Campanian on the basis of systematic composition, palynological, paleomagnetic and isotopic data. Direct continuity between the Envymaam and the Ust’-Emuneret floristic assemblages from the subjacent Emuneret Formation it isn’t observed that is caused probably by the poor composition of the Envymaam floristic assemblage. Palynological assemblages from the Envymaam, Ust’-Emuneret, Ola and Arkagala Formations are very similar.

A holopsenelline wasp in mid-Cretaceous amber from Myanmar (Hymenoptera: Bethylidae)

2019 ◽  
Vol 2 (2) ◽  
pp. 199-204 ◽  
Author(s):  
MICHAEL S. ENGEL
Keyword(s):  
Early Cretaceous ◽  
New Genus ◽  
Wing Margin ◽  
New Genus And Species ◽  
Burmese Amber ◽  
First Occurrence ◽  
Cretaceous Deposits

A new genus and species of the basal bethylid subfamily Holopsenellinae is described and figured from a female in Burmese amber, the first occurrence of the lineage outside of the Early Cretaceous deposits of Lebanon. Holopsenelliscus pankowskiorum gen. and sp. nov., differs from other holopsenellines most notably in the discontinuous anterior wing margin and open subdiscal cell, among other traits. The genus and species are described in full and distinguished from Holopsenella primotica Engel et al. in Lebanese amber and Cretabythus sibiricus Evans in Taimyrian amber. A key to the genera of Holopsenellinae is provided.

Ctenochasmatid pterosaurs from Early Cretaceous deposits in Chile

2006 ◽  
Vol 27 (5) ◽  
pp. 603-610 ◽  
Author(s):  
David M. Martill ◽  
Eberhard Frey ◽  
C.M. Bell ◽  
Guillermo Chong Diaz
Keyword(s):  
Early Cretaceous ◽  
Cretaceous Deposits

scholarly journals Origin of peloids in Early Cretaceous deposits, Dorset, South England

Facies ◽  
2005 ◽  
Vol 51 (1-4) ◽  
pp. 264-274 ◽  
Author(s):  
Elias Samankassou ◽  
Jonas Tresch ◽  
André Strasser
Keyword(s):  
Early Cretaceous ◽  
Cretaceous Deposits
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