English Jurassic Limestone Country: Stroud, Central Cotswolds

Geology Today ◽  
2015 ◽  
Vol 31 (1) ◽  
pp. 28-32 ◽  
Author(s):  
Jonathan Paul
Keyword(s):  
Jurassic Limestone

25 Jahre nationale Bodenbeobachtung im Schweizer Wald | 25 years of soil monitoring at forest sites in Switzerland

2010 ◽  
Vol 161 (12) ◽  
pp. 517-523
Author(s):  
Reto Giulio Meuli ◽  
Peter Schwab
Keyword(s):  
Organic Pollutants ◽  
Monitoring Network ◽  
Soil Protection ◽  
Soil Monitoring ◽  
Guide Value ◽  
Sampling Campaign ◽  
Forest Sites ◽  
Limestone Weathering ◽  
Guide Values ◽  
Jurassic Limestone

The national soil monitoring network (Nabo) consists of 105 sites across Switzerland, 28 of which are located in forests. After 25 years already seven forest sites (25%) were more or less damaged by storms. Two of them had to be abandoned for a decade to recover. Concerning precautionary soil protection the legal guide value is exceeded at three forest sites for cadmium and at one site also for chromium. These sites are all based on Jurassic limestone, and it is well known that residuals of limestone weathering can be rich in cadmium. Hence, the enrichment is supposed to be of geogenic origin. In the Canton Ticino the top soil at Novaggio site exceeds the guide value for lead. Here, anthropogenic origin is very likely. The analysis of the organic pollutants PAH and PCB in the third sampling campaign revealed moderate concentrations with a maximum lower than or equal to ⅔ of the corresponding guide value. Based on the results of the first four sampling campaigns it can be concluded that only small changes in the measured heavy metal concentrations in the top soils at the 28 Nabo sites were found. The most dynamic element is lead. Most of the concentrations are far below the guide values, the same holds for the organic pollutants PAH and PCB.

scholarly journals Process Design for a Production of Sustainable Materials from Post-Production Clay

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 953
Author(s):  
Michał Łach ◽  
Reda A. Gado ◽  
Joanna Marczyk ◽  
Celina Ziejewska ◽  
Neslihan Doğan-Sağlamtimur ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Waste Production ◽  
Sustainable Materials ◽  
Post Production ◽  
Rich Material ◽  
Jurassic Limestone ◽  
By Products ◽  
Alkali Activated

Alkali activated cement (AAC) can be manufactured from industrial by-products to achieve goals of “zero-waste” production. We discuss in detail the AAC production process from (waste) post-production clay, which serves as the calcium-rich material. The effect of different parameters on the changes in properties of the final product, including morphology, phase formation, compressive strength, resistance to the high temperature, and long-term curing is presented. The drying and grinding of clay are required, even if both processes are energy-intensive; the reduction of particle size and the increase of specific surface area is crucial. Furthermore, calcination at 750 °C ensure approximately 20% higher compressive strength of final AAC in comparison to calcination performed at 700 °C. It resulted from the different ratio of phases: Calcite, mullite, quartz, gehlenite, and wollastonite in the final AAC. The type of activators (NaOH, NaOH:KOH mixtures, KOH) affected AAC mechanical properties, significantly. Sodium activators enabled obtaining higher values of strength. However, if KOH is required, the supplementation of initial materials with fly ash or metakaolin could improve the mechanical properties and durability of AAC, even c.a. 28%. The presented results confirm the possibility of recycling post-production clay from the Raciszyn II Jurassic limestone deposit.

A propos de l'age de la serie ophiolitique dans les Dinarides yougoslaves; la coupe de Mihajlovici aux confins de la Serbie et du Montenegro (region de Plevlja, Yougoslavie)

1964 ◽  
Vol S7-VI (1) ◽  
pp. 107-112 ◽  
Author(s):  
Jean Aubouin ◽  
Jean Paul Cadet ◽  
Jean Paul Rampnoux ◽  
Gonzague Dubar ◽  
Pierre Marie
Keyword(s):  
Upper Jurassic ◽  
Lower Jurassic ◽  
Jurassic Limestone

Abstract The Mihajlovici area in southwestern Yugoslavia is a mosaic of fault blocks produced by two sets of large faults, trending NW and NE. The horsts are lower Jurassic limestone, and the grabens are occupied by diabase-radiolarite, known as the ophiolitic series, of lower Malm age (upper Jurassic). Abundant ammonites and microfauna identify several horizons, notably the Toarcian (upper Lias, i.e., lower Jurassic) and the uppermost bed of the lower Malm, thus fixing the Malm age of the ophiolitic series.

Etude structurale d'un micropli du synclinal de Saint-Disdier-en-Devoluy (Hautes-Alpes)

1958 ◽  
Vol S6-VIII (2) ◽  
pp. 165-172
Author(s):  
Micheline d' Albissin
Keyword(s):  
French Alps ◽  
Jurassic Limestone

Abstract A microfold has been observed in Tithonian (Jurassic) limestone of the northeastern margin of the Saint-Disdier-en-Devoluy syncline in the French Alps. In the plane perpendicular to its axis, the microfold is characterized by a series of stylolitic joints mainly oriented perpendicularly to the layers in two different planes. Detailed observations of these stylolites and fissures shows that there have been several phases of fissuring and stylolite formation between deposition of the limestone as a horizontal bed and the development of the microfold and that the direction of pressure changed during folding.

A newly discovered kimberlitic rock from Pakistan

1990 ◽  
Vol 54 (377) ◽  
pp. 537-546 ◽  
Author(s):  
Zulfiqar Ahmed ◽  
George R. McCormick
Keyword(s):  
Mineral Chemistry ◽  
Early Jurassic ◽  
Indian Plate ◽  
Chromian Spinel ◽  
First Report ◽  
Plate Margin ◽  
Jurassic Limestone

AbstractThis first report of the occurrence of a kimberlitic rock in Pakistan is supported by its field relations, textures and mineral chemistry. Linear dykes, lenses, conical and pipe-like bodies, plugs and sills intrude non-orogenic, early Jurassic limestone near the SW extremity of an Eocene-emplaced ophiolite on the transform-type Indian plate margin; far away from the stable Precambrian craton. The rock resembles ‘micaceous kimberlites’ petrographically and contains olivine, phlogopite, perovskite, chromian spinel, monticellite, chlorite, serpentine, calcite, apatite, pectolite, clinopyroxene, amphibole, nepheline, magnetite and titanomagnetite. The minerals and their microprobe analyses resemble those of kimberlitic rocks.

Long Barrows and Neolithic Elongated Enclosures in Lincolnshire: An Analysis of the Air Photographic Evidence

1998 ◽  
Vol 64 ◽  
pp. 83-114 ◽  
Author(s):  
Dilwyn Jones
Keyword(s):  
Principal Component ◽  
Aerial Survey ◽  
Royal Commission ◽  
Eastern Region ◽  
Photographic Evidence ◽  
Historical Monuments ◽  
Comprehensive Survey ◽  
Air Photo ◽  
Jurassic Limestone

The long barrows of Lincolnshire have been the subject of long-term but intermittent interest. One aspect not investigated hitherto is the air photographic evidence for plough-levelled long barrows. Recently completed mapping work in the county by the Aerial Survey section of the Royal Commission on the Historical Monuments of England (RCHME), as part of the National Mapping Programme, has made possible the analysis of the air photographic evidence. This article presents an evaluation of that evidence and considers its significance in terms of the Neolithic of the region.A comprehensive survey of air photo collections has dramatically increased the number of long barrows known in the county, identifying over 50 examples of levelled sites. The majority are found on the chalk Wolds where the dozen surviving earthwork monuments are located. The distribution of long barrows in the county may now be extended onto the Jurassic Limestone ridge to the west where five examples have been recorded. The Lincolnshire long barrow enclosures have three categories of shape; oval, trapeziform, and oblong. The ditch plan is predominantly full-enclosing, and is found as the distinct form in the eastern region of England. The morphology and dimensions of two sites suggests they may have been a long mortuary enclosure or short cursus.At Harlaxton in the southern Limestone a long barrow enclosure forms part of an extensive later Neolithic ritual complex which incorporates a multiple pit-alignment as a principal component. The form of the complex appears to be unique and underlines the importance of Harlaxton as an inter-regional link.

Cement render and mortar and their damages due to salt crystallization in the Holy Trinity Dominicans monastery in Cracow, Poland

2020 ◽  
Author(s):  
Mariola Marszałek ◽  
Krzysztof Dudek ◽  
Adam Gaweł ◽  
Jerzy Czerny
Keyword(s):  
Laboratory Tests ◽  
Mercury Intrusion Porosimetry ◽  
Cement Mortar ◽  
Salt Crystallization ◽  
Secondary Minerals ◽  
X Ray ◽  
Mercury Intrusion ◽  
Holy Trinity ◽  
Micro Raman Spectroscopy ◽  
Jurassic Limestone

<p>The presented investigations are focused on a part of the 13<sup>th</sup> century Church of the Holy Trinity Dominicans monastery in Cracow, Poland, and include the wall façade of the 17<sup>th </sup>century Myszkowski chapel. The chapel was probably designed by Santi Gucci Fiorentino and built by his workshop. Southern façade of the chapel is made of Tertiary limestone blocks that make characteristic rusticated wall. Lower part of the façade is covered with cement and the basement is made of irregular fragments of Jurassic limestone and Cretaceous sandstone partly replaced and bound with cement mortar. The façade revealed clear signs of damage ranging from dark gray soiling of the surface, scaling to efflorescences. The last ones – mainly on the border of limestone blocks and the cement in the part of the basement.</p><p>Laboratory tests included mineralogical, chemical and petrophysical analyses. Optical microscopy, scanning electron microscopy (SEM-EDS), micro-Raman spectroscopy and X-ray diffractometry (XRD) were used for analysing materials and deterioration products of the cement render and mortar. The petrophysical properties of the materials have been performed using mercury intrusion porosimetry. The secondary minerals detected include mainly gypsum CaSO<sub>4</sub>·2H<sub>2</sub>O, thenardite Na<sub>2</sub>SO<sub>4</sub>, <sub> </sub>aphthitalite (Na,K)<sub>3</sub>Na(SO<sub>4</sub>)<sub>2</sub>, darapskite, Na<sub>3</sub>(SO<sub>4</sub>)(NO<sub>3</sub>)·H<sub>2</sub>O, nitre KNO<sub>3</sub>, nitratine NaNO<sub>3</sub>, ettringite Ca<sub>6</sub>Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>12</sub>·26H<sub>2</sub>O and monosulphite Ca<sub>4</sub>Al<sub>2</sub>O<sub>6</sub>SO<sub>3</sub>·11H<sub>2</sub>O. Lower blocks of the façade covered with cement contain chiefly gypsum, ettringite and monosulphite, cement from the basement – gypsum and nitre; while efflorescences – thenardite, aphthitalite, darapskite, nitre and nitratine. The origin of the salts have been discussed and the differences in their type have been associated with composition of the materials and their physicochemical properties.</p><p>This work has been financially supported by the AGH University of Science and Technology, statutory grant no. 16.16.140.315.</p>

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