Wealden of the Weald: a new model

Allen, P.

doi:10.1016/s0016-7878(75)80057-5

Cited by 122 publications

(62 citation statements)

References 62 publications

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“…In the Weald of southern England, Allen (1975Allen ( , 1981 suggests that two episodes of major fan-building produced the Ashdown and Lower Tunbridge Wells sandy outwash plains in the Lower Cretaceous. During both episodes, outwash spreading south from Londinia encountered and intermingled with similar deposits building north from Armorica.…”

Section: Palaeogeographical Discussionmentioning

confidence: 99%

“…For example, he finds that in Lower Wealden times sandy detritus with high staurolite/kyanite ratios, indicative of high-grade metamorphic source rocks, entered southern England from the south but is confined to Sussex. Other lines of evidence include the petrography of the larger clasts and the argon-40/argon-39 ages of detrital tourmaline and other minerals (Allen, 1949(Allen, , 1972(Allen, , 1975(Allen, , 1981. A stratigraphical comparison between the age distribution of detrital zircons in the two Wealden sandstone samples we examined is given in Table 4.…”

Section: Palaeogeographical Discussionmentioning

confidence: 99%

“…Armorican debris seems totally absent. Argon-40/argon-39 ages of 258± 11, 207± 16 or 237+ 11 and > 372 + 40 Ma obtained from detrital tourmaline (Allen, 1975) (Tidmarsh, 1932;Miller, Shibata & Munro, 1962;Miller & Mohr, 1964) and volcanic clasts in the Lower Permian breccias and conglomerates of Devon (see Hatch, Wells & Wells, 1961, p. 484;Laming, 1966;Cosgrove & Elliott, 1976), neither mid nor late Jurassic volcanism has been recorded there. The source vents from which the Bathonian Fuller's Earth was erupted are unknown.…”

Section: A J H U R F O R D F J F I T C H and A C L A R K Ementioning

confidence: 99%

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Resolution of the age structure of the detrital zircon populations of two Lower Cretaceous sandstones from the Weald of England by fission track dating

1984

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-Modes in the frequency of distribution of fission track ages obtained from detrital zircon grains may prove characteristic of individual sandstone bodies, supporting the identification of the sources from which a particular flow of sedimentary detritus was derived and thus allowing new inferences to be made concerning palaeogeography. A computer program has been written and used to identify modes in the zircon fission track age distribution within two Lower Cretaceous sandstone samples from the Weald of southern England. Pronounced modes appear in one rock around 119 Ma, 160 Ma, 243 Ma and 309 Ma and in the other around 141 Ma, 175 Ma, 257 to 277 Ma and 394 to 453 Ma. The geological implications of these quite dissimilar zircon age spectra are discussed. It is concluded that they support the palaeogeographical models of Allen (1981) and indicate that the provenance of the first sample, from the Top Ashdown Sandstone member at Dallington in East Sussex, was almost entirely southerly, while that of the second, from the Netherside Sand member at Northchapel in West Sussex, was more varied, but predominantly westerly and northerly.

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Section: Palaeogeographical Discussionmentioning

confidence: 99%

Section: Palaeogeographical Discussionmentioning

confidence: 99%

Section: A J H U R F O R D F J F I T C H and A C L A R K Ementioning

confidence: 99%

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Resolution of the age structure of the detrital zircon populations of two Lower Cretaceous sandstones from the Weald of England by fission track dating

1984

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“…Few sedimentologists working on ancient sequences have appreciated the linkage between fire and erosion/depositional cycles (but see Allen 1974;Nichols & Jones 1992;Scott & Jones 1994). Fires may result in a significant increase in erosion and hence deposition in a basin (Swanson 1981).…”

Section: Sedimentologymentioning

confidence: 99%

The legacy of Charles Lyell: advances in our knowledge of coal and coal-bearing strata

Scott

1998

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“…3 (Gallois et al, 1972). The Weald Clay was deposited in southern England during late Neocomian times and represents a coastal mudswamp with lagoons and sandy water-courses, connected northwestwards with a sea over East Anglia (Allen, 1976 age (c. -35 m.y.). These are Mastotermitidae, Kalotermitidae, Rhinotermitidae and Termitidae (Jarzembowski, 1980).…”

Section: Introductionmentioning

confidence: 99%