Download A Field Guide to the Carboniferous Sediments of the Shannon by James L. Best, Paul B. Wignall PDF
By James L. Best, Paul B. Wignall
The Carboniferous Shannon Basin of Western eire has develop into probably the most visited box components on the earth. It offers an excellent chance for interpreting a variety of historic sedimentary environments, together with carbonate shelf, reefs and dirt mounds, black shales and phosphates, and a spectrum of deep sea, shallow marine, fluvio-deltaic and alluvial siliciclastic sediments. the world boasts broad outcrops and a few of the main popular sections via turbidites, large-scale gentle sediment deformation positive aspects and sediments that show a reaction to tectonic and sea-level controls.
This box advisor offers the 1st synthesis of the important localities during this sector of Western eire, and provides an simply available guide that may consultant the reader to, and inside of, quite a lot of sedimentary facies, permitting an realizing of the evolving nature of the fill of this Carboniferous basin and the context of its sedimentary and tectonic evolution. The advisor summarizes contemporary and new paintings within the zone through quite a number authors and descriptions problems with present debate in regards to the Shannon Basin and its palaeoenvironmental interpretation. the sector advisor will locate vast use in instructing and study through educational researchers, expert and novice geologists, in addition to by way of utilized geologists, geophysicists and reservoir engineers who use those outcrops as analogues for subsurface reservoirs in lots of parts of the world.
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Additional resources for A Field Guide to the Carboniferous Sediments of the Shannon Basin, Western Ireland
Sample text
34 Chapter 2 0 Undifferentiated Namurian Depth (m) 1000 Clare Shale Dinantian Carbonates ‘Basal Clastics’ Core 2000 Cuttings Killard outcrop 3000 1 2 3 Rm (%) 4 5 6 7 8 910 Fig. 6. Distribution of vitrinite reflectance (Rm) in the Doonbeg No. 1 Well (after Clayton & Baily, 1999). Thus, the rocks of the Shannon Trough indicate relatively low levels of tectonic deformation but higher than expected burial temperatures, and there is some evidence that the peak temperatures preceded fold development.
Sometimes forming coalescing, reef‐like mounds, these Waulsortian carbonates lack constructing organisms like normal reefs and instead have a high proportion of cement that infills large‐ stromatactis‐like cavities and fissures (Lees, 1961; Lees & Miller, 1995). The Waulsortian facies of southern Ireland are the most extensive strata of this unusual limestone, and the huge thickness in the Shannon Basin, where it approaches 1200 m thick, is by far the thickest development in the world (Shephard‐Thorn, 1963; Sleeman & Pracht, 1999).
Mehli Mississippian Parsonage Fm. Ballysteen & Foynes Clare Shale Fm. Corgrig Lodge Fm. Parsonage Fm. North Burren Clare Shale Fm. Stage Clare Shale Fm. Lochriea Gnathodus Loch. commutata bilineatus nodosa Serp. Ballybunnion Conodont Biozones 50 Chapter 4 Magowna Fm. Brig. Slievenaglasha Fm. Asb. Shanagolden Fm. Burren Fm. Durnish Fm. Rathkeale Fm. (+ volcanics ) Holk. Tubber Fm. Arun. (Finavarra Member) Limerick Limestone Fm. ( Waulsortian facies ) Ballynash Mb. Ballysteen Fm. Ballymartin Fm. Ballyvergin Fm.