A revised lithostratigraphy for the Inferior Oolite Group (Middle Jurassic) of the Cotswolds, England

Barron, A.J.M.; Sumbler, M.G.; Morigi, A.N.

doi:10.1016/s0016-7878(97)80012-0

Cited by 17 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Earlier studies on English Middle Jurassic thecideoids focussed mainly on the description of specimens from the Bajocian deposits of Dundry Hill, near Bath. The Aalenian thecideoid fauna from the Cotswold area around Cheltenham (Worcester Basin of Barron et al. 1997) remained undetected until the discovery of moorellinids in the Oolite Marl (Baker 1969) and later, in marly horizons associated with the coarse‐grained shelly pisolites of the Pea Grit (Baker and Elston 1984).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The early ontogeny of Jurassic thecideoid brachiopods and its contribution to the understanding of thecideoid ancestry

Baker

Carlson

2010

Palaeontology

View full text Add to dashboard Cite

A collection of very early brephic juveniles from the Upper Aalenian of the Cotswolds, England, has provided the first opportunity to study the ontogeny of thecideoids prior to the recognizable development of a median septum. Traced towards their origin, the enduring characters of thecideides appear to be cementation, a delthyrium closed by a pseudodeltidium, an almost circular dorsal valve with a prominent erect bilobed cardinal process, well-defined inner socket ridges, widely spaced lateral adductor muscle fields, tubercles, fibrous secondary shell lining both valves and probably endopunctae. The subperipheral rim and median septum so characteristic of adult thecideoids are undeveloped in the earliest juveniles. Initiation of the development of the free ventral wall in the ventral valve is identified as an important event in thecideoid ontogeny. Further important discoveries arising from the study are that the crura-like outgrowths which form the brachial bridge in thecideides are not structurally homologous with the crura of spiriferides or terebratulides and that during their earliest ontogenetic development thecidellinids and thecideids are indistinguishable. Also, the identification of morphological characters correlative with both palaeontological and neontological approaches to thecideoid phylogeny has important implications for thecideide taxonomy. Interpretation of the morphology exhibited by the Cotswold specimens introduces the probability that during their earliest ontogeny moorellinin, thecidein and lacazellin dorsal valves follow the same development pattern and the described ontogenetic sequence has been corroborated by evidence from Jurassic rocks of Argentina, North America and France, from Cretaceous rocks of England, Central Europe and Czechoslovakia, also from extant species from the Atlantic, Indian and Pacific oceans, and to an extent which suggests the pattern of ontogenetic development revealed has been typical of thecideoids throughout their history.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Juvenile thecideoids occur in brachiopod assemblages of Aalenian age throughout the Cotswolds (Baker 1969; Baker and Elston 1984; Morris 1980) (see Barron et al. 1997, for revised lithostratigraphy).…”

Section: Investigation Of the Unassigned Dorsal Valvesmentioning

confidence: 99%

The early ontogeny of Jurassic thecideoid brachiopods and its contribution to the understanding of thecideoid ancestry

Baker

Carlson

2010

Palaeontology

View full text Add to dashboard Cite

show abstract

“…The local bedrock is Inferior Oolitic limestone (Jurassic), with overlying scattered, superficial, periglacial deposits of clay, typically up to 30 cm (Barron et al, 1997;Barron, 1998). The rock type is the Cleeve Cloud member of the Birdlip Limestone Formation, and is off-white to pale brown, well-sorted to very coarse grained ooidal limestone, locally sandy or shell-detrital.…”

Section: Topographical Geological and Pedological Data On The Bowsingsmentioning

confidence: 99%

Functional analysis of settlement areas: prospection over a defended enclosure of iron age date at The Bowsings, Guiting Power, Gloucestershire, UK

Marshall¹

2001

Archaeol. Prospect.

View full text Add to dashboard Cite

A small, well-preserved, trapezoidal, ditched enclosure of mid to later Iron Age date at The Bowsings (Guiting Power, Gloucestershire, UK), closely defined in plan by magnetometer and resistivity survey, supplemented by extensive excavation, can be further divided into areas of differing usage by mapping levels of magnetic susceptibility (MS) and inorganic phosphate in basal topsoil over the site. A clear impression of the enclosure, with internal areas for habitation and pit-based storage, persists as a pattern of MS enhancement in the topsoil, and such survival may be of interest in the detection and analysis of highly eroded sites elsewhere. Although the habitation area showed well as an area of MS enhancement, its relative transparency to gradiometry provided another example of a larger class of such features, and stresses the importance of supplementing gradiometry with MS survey to provide more adequate assessment of sites. Use of MS survey as a method of prospection is discussed, especially in relation to adequacy of resolution. Application to MS survey of a newly developed, ground-insertable microprobe is briefly introduced as a means of increasing productivity of such surveys.

show abstract

“…The Jurassic bedrock strata of the Cotswold Hills in the southwest UK (Fig. 1) form an alternating succession of permeable oolitic limestones and impermeable mudstones and clays, reflecting relatively modest sea-level fluctuations in a shallow marine environment (Sumbler et al, 2000; Barron et al, 1997). Described as “classic cuesta terrain,” the landscape has a steep, west-facing escarpment and a gentler southeastern dip slope (Goudie and Parker, 1996, p. 34).…”

Section: Introductionmentioning

confidence: 99%

Dating springlines from hydrogeological and archaeological evidence

Paul

Moore²

2022

Quat. res.

View full text Add to dashboard Cite

The relationship between prehistoric populations and water is often poorly understood, partly as a function of historical reliance on qualitative and fragmentary datasets in many regions. Here, we adopt a quantitative approach to analyze a specific aspect of the relationship between prehistoric populations and water for the Cotswold Hills, southwest UK; an area of documented hydrogeological change and extensive Neolithic (ca. 5.5 ka) activity. Using a database of all known Neolithic monuments, we interrogate the significance of water to their habitation. By marshaling a large dataset of recent (ca. 100 years) changes in the discharge and elevation of 259 springs, we establish a striking negative relationship between present-day spring discharge and annual elevation change. We then formulate an inverse problem to predict spring elevations in Neolithic times. Spring elevations are predicted to be closer to, and higher than, Neolithic-dated sites relative to the location of modern springs. These results emphasize a utilitarian and/or reverential link between water and prehistoric populations. Our approach of reconciling markedly different datasets and timescales can easily be adapted to other regions. While groundwater had behaved reasonably predictably since Neolithic times, recent human activity is (and will continue to be) far more significant in influencing groundwater behavior.

show abstract

A revised lithostratigraphy for the Inferior Oolite Group (Middle Jurassic) of the Cotswolds, England

Cited by 17 publications

References 15 publications

The early ontogeny of Jurassic thecideoid brachiopods and its contribution to the understanding of thecideoid ancestry

The early ontogeny of Jurassic thecideoid brachiopods and its contribution to the understanding of thecideoid ancestry

Functional analysis of settlement areas: prospection over a defended enclosure of iron age date at The Bowsings, Guiting Power, Gloucestershire, UK

Dating springlines from hydrogeological and archaeological evidence

Contact Info

Product

Resources

About