The use of high-resolution stratigraphy and derived lithoclasts to document structural inversion; a case study from the Paleogene, Isle of Wight, U.K.

2021 ◽  
pp. jgs2020-156
Author(s):  
Andy Gale

The effects of structural inversion, generated by the Pyrenean Orogeny on the southerly bounding faults of the Hampshire Basin (Needles and Sandown Faults) on Eocene sedimentation in the adjacent regions were studied in outcrops by sedimentary logging, dip records and the identification of lithoclasts reworked from the crests of anticlines generated during inversion. The duration and precise age of hiatuses associated with inversion was identified using bio- and magnetostratigraphy, in comparison with the Geologic Time Scale 2020. The succession on the northern limb of the Sandown Anticline (Whitecliff Bay) includes five hiatuses of varying durations which together formed a progressive unconformity developed during the Lutetian to Priabonian interval (35-47Ma). Syn-inversion deposits thicken southwards towards the southern margin of the Hampshire Basin and are erosionally truncated by unconformities. The effects of each pulse of inversion are recorded by successively shallower dips and the age and nature of clasts reworked from the crest of the Sandown Anticline. Most individual hiatuses are interpreted as minor unconformities developed subsequent to inversion, rather than eustatically-generated sequence boundaries:transgressive surfaces. In contrast, the succession north of the Needles Fault (Alum Bay) does not contain hiatuses of magnitude or internal unconformities. In the north-west of the island, subsidiary anticlinal and synclinal structures developed in response to Eocene inversion events by the reactivation of minor basement faults. The new dates of the Eocene inversion events correspond closely with radiometric ages derived from fracture vein-fill calcites in Dorset, to the west (36-48Ma).

2015 ◽  
Vol 55 (1) ◽  
pp. 105 ◽  
Author(s):  
Tegan Smith ◽  
James Ogg ◽  
Andrew Kelman ◽  
Steve Abbott ◽  
Thomas Bernecker

A standardised and precise timescale is invaluable to geological research and crucial to meaningful correlation at local, regional and global scales for both researchers and industry. Modern techniques and instruments are delivering increasingly accurate ages, and biozonation schemes are continually refined and standardised on a global basis. Updates to the international geologic time scale occur regularly, and constant updates to stratigraphic schemes are required to ensure that major regional geological events can be correlated across the Australian margin. Several different sequence stratigraphic schemes have been developed for the basins of the North West Shelf. These range from basin-specific to margin-wide schemes. While these schemes have much in common, there are some significant differences. Understanding the nature and reasons for both the differences and commonalities is an essential step for improving understanding of the region’s evolution. The continuing improvements being made to biostratigraphic zonation schemes for the Triassic to Cenozoic will assist in better defining sequences and correlations, and allow geologists to better understand whether apparent differences in sequence definition across the margin are real, and therefore if they reflect different basin histories or are simply an artefact of biostratigraphic imprecision. Geoscience Australia endeavours to—in collaboration with industry—produce unified stratigraphic schemes for the various hydrocarbon provinces. This work will fundamentally support present and future acreage releases.


1964 ◽  
Vol 44 (1) ◽  
pp. 1-8

Early in 1963 much of the land occupied by the Roman building at Fishbourne was purchased by Mr. I. D. Margary, M.A., F.S.A., and was given to the Sussex Archaeological Trust. The Fishbourne Committee of the trust was set up to administer the future of the site. The third season's excavation, carried out at the desire of this committee, was again organized by the Chichester Civic Society.1 About fifty volunteers a day were employed from 24th July to 3rd September. Excavation concentrated upon three main areas; the orchard south of the east wing excavated in 1962, the west end of the north wing, and the west wing. In addition, trial trenches were dug at the north-east and north-west extremities of the building and in the area to the north of the north wing. The work of supervision was carried out by Miss F. Pierce, M.A., Mr. B. Morley, Mr. A. B. Norton, B.A., and Mr. J. P. Wild, B.A. Photography was organized by Mr. D. B. Baker and Mrs. F. A. Cunliffe took charge of the pottery and finds.


2007 ◽  
Vol 52 (2) ◽  
pp. 381-394 ◽  
Author(s):  
C.D.H. Wilson ◽  
I.D. Williams
Keyword(s):  

1951 ◽  
Vol 31 (3-4) ◽  
pp. 132-148 ◽  
Author(s):  
K. M. Richardson ◽  
Alison Young

In 1946 a visit to the barrow, which lies on the edge of the western scarp of Chinnor Common, and a cursory examination of the adjoining area, cultivated during the war, resulted in finds of pottery and other objects indicating Iron Age occupation. The site lies on the saddleback of a Chiltern headland, at a height of about 800 ft. O.D. Two hollow ways traverse the western scarp, giving access to the area from the Upper Icknield Way, which contours the foot of the hill, then drops to cross the valley, passing some 600 yards to the north of the Iron Age site of Lodge Hill, Bledlow, and rising again continues northwards under Pulpit Hill camp and the Ellesborough Iron Age pits below Coombe Hill. The outlook across the Oxford plain to the west is extensive, embracing the hill-fort of Sinodun, clearly visible some fourteen miles distant on the farther bank of the Thames. The hollow way at the north-west end of the site leads down to a group of ‘rises’ hard by the remains of a Roman villa, and these springs are, at the present day, the nearest water-supply to the site.


1982 ◽  
Vol 14 (10) ◽  
pp. 1389-1404 ◽  
Author(s):  
A R Townsend

The severe downturn in the British economy in 1980 is apparent in regional data for employment (provisional), redundancies, and unemployment. Five shift-share analyses are used here to explore the data on employment and redundancies, three of them conducted at ‘minimum list heading’ level. The period 1976 to 1979 is one of poor performance by regions of traditional policy interest, whereas the events of 1980 are seen as essentially a national phenomenon. However, bias in the industrial composition of the recession towards manufacturing in general and towards certain individual products is sufficient to focus its very worst effects on Wales, the West Midlands, and the North West.


2018 ◽  
Vol 22 (1) ◽  
pp. 29-45
Author(s):  
Fabio Silva

This paper applies a combined landscape and skyscape archaeology methodology to the study of megalithic passage graves in the North-west of the Iberian Peninsula, in an attempt to glimpse the cosmology of these Neolithic Iberians. The reconstructed narrative is found to be supported also by a toponym for a local mountain range and associated folklore, providing an interesting methodology that might be applied in future Celtic studies. The paper uses this data to comment on the ‘Celticization from the West’ hypothesis that posits Celticism originated in the European Atlantic façade during the Bronze Age. If this is the case, then the Megalithic phenomenon that was widespread along the Atlantic façade would have immediately preceded the first Celts.


Author(s):  
Manuel Abad Varela

A la vista de como se han producido la mayoría de los hallazgos analizados y según se desprende de las fuentes escritas, diríamos que en la península ibérica y sobre todo en la parte Occidental se realizaron en la Antigüedad ofrendas monetales a divinidades de las aguas y fundamentalmente, por las referencias que tenemos, a las divinidades de las fuentes termales. Únicamente nos queda la duda de si la fuente de Peña Cutral en Retortillo (Reinosa, Santander) es termal o no, pues si no lo fuese sería el único hallazgo dentro de una fuente no termal. Se podría entender, con ciertos reparos en algún caso, que también se hicieron arrojándolas al curso de los ríos, depositándolas en la orilla y lanzándolas a las charcas o pantanos. Por otro lado, las monedas que se han encontrado en las fuentes, en contraposición con las recogidas en los ríos, suelen estar en muy mala conservación, hasta el punto de que muchas se desintegran en las manos al estar muy atacadas por los ácidos. A juzgar por algunos de los hallazgos, se podría creer que las ofrendas más valiosas se procuró depositarlas en lugares seguros o resguardados, como es el caso de la Hermida, de la Fuente de El Sarso, del Balneario de Fortuna y podríamos recordar también el hallazgo del conocido depósito de Oñate. De acuerdo con la cronología de las monedas y según sus resultados estadísticos, la costumbre o rito de depositar o arrojar «stips» a las aguas, principalmente termales, se practicó en la península Ibérica más intensamente entre los siglos i a. C. al ii d. C. Este período coincide con el momento que más estuvo en boga el uso de las aguas termales, a juzgar por lo que se trató el tema en las fuentes escritas. Al mismo tiempo que se percibe esta moda en la vida diaria, pues Suetonio nos dice que Augusto, a pesar de que por su naturaleza enfermiza no abusaba de los baños, sin embargo, cuando necesitaba templar los nervios tomaba baños de mar o las aguas termales de Albula ^'. De Nerón nos dice que cuando reconstruyó su casa en Roma después del incendio, la famosa domus áurea, hizo llegar a las salas de baño agua de mar y de Albula *"*. Por las aras recogidas en las fuentes termales, sabemos que las divinidades que más se sintieron favorecidas con estas ofrendas monetales fueron las Ninfas y las aguas que más beneficios causaron o por las que se sintieron más agradecidos los visitantes fueron las de aguas sulfuradas- cálcicas, es decir, las que se recomiendan principalmente para los problemas de dermatosis herpética, neurosis y catarros crónicos de las vías respiratorias ^^ sin que ésto signifique que hubiese alguna relación entre las cualidades de las aguas y las divinidades a quienes se dedicaron las aras. Finalmente, conviene señalar que son éstas las únicas conclusiones a las que nos atrevemos a llegar partiendo de las informaciones que tenemos. No obstante, deseamos que en un futuro se produzcan más hallazgos en lugares tan particulares como los señalados, fuentes, ríos y lagos, que nos permitan confirmar o desmentir con más precisión nuestras hipótesis. Para que ésto suceda animo desde aquí a los arqueólogos para que busquen este tipo de yacimientos y tengan en cuenta sus ofrendas, tratándolas con cuidado por su mal estado, y no tardando en darlas a conocer como tales.This paper deals with the finding of thirty one cases of possible monetary offerings to the divinities in the waters of the Spanish península. The largest number of cases involve springs, which make up 74.19 % of the total, of which 78.26 % are hyperthermal springs with temperatures ranging between 15 and 70 C. Most of these springs are to be found ín the West of Spaín. They are mainly connected with the Nymphis, except in the North West, where they are offered up to Apollini, to judge from the devotional alters which can be sean. It would appear, from the coins collected, that the custom of throwing stipes to the deities of the springs was mostly practiced between the 1st century B.C. and the 2nd century A. D., although a slight increase can be seen towards the middie of the 4th century A. D. The thermal springs which benefitted nnost from the profits of these offerings were those with suifuric-caicic waters.


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