.... It has also revealed some of the complexities of the Fossil Gully Fault Zone, among which different periods and directions of component fault movements are indicated. Faunal evidence shows that the Plagiura–Kochaspis to Albertella and Albertella to Glossopleura zonal boundaries lie within the Takakkaw...

... directly above the Lower Cambrian Prospect Mountain quartzite, and below the Upper Cambrian Dunderberg formation. Though faulted, the section has yielded rich trilobite faunas representing in ascending order the Middle Cambrian zones: Albertella, Glossopleura and Bathyuriscus-Elrathina . The Bolaspidella...

... Biozone recognized in the Great Basin, which is equivalent to the traditional Albertella Biozone of Laurentia. Because corynexochids are almost absent, the low-diversity ‘kochaspid'-dominated biofacies appears to typify the platform interior. The fauna is entirely Laurentian in composition, reinforcing...

... outlined. The Snake Indian contains four Middle Cambrian zones: Plagiura-‘Poliella’ , Albertella , Glossopleura , and lower Bathyuriscus-Elrathina , of which only the latter three have been identified at the type section. Correlative formations in the Bow Valley region are the Mount Whyte, Cathedral...

... fossiliferous trilobite sequence, but most ranges in western Utah contain the following faunas: Albertella , Glossopleura , Ehmaniella , Ptychagnostus gibbus , Bathyuriscus fimbriatus , and Eldoradia . Geological Society of America 1975 stratigraphic nomenclature trilobite faunas carbonate rocks ...

... festinata are common. The fauna of the Monkton is the correlative of the lower Parker fauna. The upper Parker contains a lower Middle Cambrian (Albertella zone) fauna with Zacanthoides, Sypacephalus, Kootenia, Chancia, and other genera; all species are new except Mexicella stator. The reinstatement...

... of the Ptarmigan limestone to the Cathedral dolomite; the stratigraphic position of the Ross Lake ( Albertella ) shale on Mounts Bosworth and Assiniboine, and the Ogygopsis shale on Mount Stephen; and the position of the southern shores of the Cambrian sea on the north side of the Montana Island. The Mounts...

... consists of mudstone and lime mudstone with minor siltstone (Williams, 1923 ; Aitken et al., 1973 ; Aitken and Cook, 1974 ; MacNaughton et al., 2013 ). Reconnaissance biostratigraphy of the Mount Clark and Mount Cap formations identified the Olenellus , Albertella , and Glossopleura zones...

... and a carbonate unit, respectively, lying unconformably on th e Precambrian Roosville Formation and overlain unconformably by Devo- nian rocks. Burling reported an Albertella fauna from the shales of th e Burton Formation and referred it with some degree of certainty to th e early Middle Cambrian (Burling, 1914...

... from the Eokochaspis nodosa to Albertella biozones of western North America, including the Arrojos Formation of Mexico ( Lochman, 1948 ); the Carrara Formation ( Palmer and Halley, 1979 ), Pioche Shale ( Walcott, 1886 ; Palmer in Merriam, 1964 ; Sundberg and McCollum, 1997, 2000 ; Eddy...

...Figure 2 —Generalized biostratigraphic correlation chart of the biozones proposed here and those previously named for interval between the Olenellus and Albertella biozones. The thick dashed lines represent where various authors placed the Lower-Middle Cambrian boundary. The biozones...

... normale ?, A . laticaudum ?); from the Ptychagnostus praecurrens Zone of the lower Lakeview Limestone of Pend Oreille Lake, Idaho ( Amecephalus normale ?); and from the Albertella and G . walcotti zones of the Pioche Shale, Nevada ( Amecephalus laticaudum ?). The morphological terms used...

... Nephrolenellus multinodus zones of Webster 2011 ). In southern Alberta at Windsor Mountain, sandstones of the Flathead Formation, equivalent to the BSU ( Slind et al. 1994 ), underlie the Gordan Formation which yields trilobites belonging to the early middle Cambrian Albertella  Zone (= Mexicella mexicana...

... feet at the Murray Range . To the west, at Dezaiko Range, 1,335 feet of Tatei-Chetang Formatio n were measured but no contact with the underlying Mahto was found . South of Kakwa Lake, the Tatei-Chetang Formation carries three dis- tinct Middle Cambrian faunal zones, namely, Albertella, Glossopleura...