Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Flint was widely used historically to make stone tools and start fires.
Cholesbury is a village and former civil parish, now in the parish of Cholesbury-cum-St. Leonards, in Buckinghamshire, England, on the border with Hertfordshire. It is situated in the Chiltern Hills, about 4 miles (6.4 km) east of Wendover, 5 mi (8.0 km) north of Chesham and 5 mi (8.0 km) from Berkhamsted.
Hawridge is a small village in the Chilterns in the county of Buckinghamshire, England and bordering the county boundary with Hertfordshire. It is 3 miles (4.8 km) from Chesham, 4 miles (6.4 km) from both Tring and Berkhamsted. Hawridge is one of four villages making up Cholesbury-cum-St Leonards, a civil parish within Chiltern District.
Latimer is a village that sits on the border between Buckinghamshire and Hertfordshire, England. In 2013, the civil parish of Latimer was renamed, Latimer and Ley Hill. The parish, forming part of the Buckinghamshire district of Chiltern, includes the villages of Latimer, Ley Hill and Tyler's Hill.
Sarsen stones are silicified sandstone blocks found in quantity in Southern England on Salisbury Plain and the Marlborough Downs in Wiltshire; in Kent; and in smaller quantities in Berkshire, Essex, Oxfordshire, Dorset, and Hampshire.
The geology of Hertfordshire describes the rocks of the English county of Hertfordshire which are a northern part of the great shallow syncline known as the London Basin. The beds dip in a south-easterly direction towards the syncline's lowest point roughly under the River Thames. The most important formations are the Cretaceous chalks, which are exposed as the high ground in the north and west of the county, and the Cenozoic rocks made up of the Paleocene age Reading beds and Eocene age London Clay that occupies the remaining southern part.
Conglomerate is a clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts. A conglomerate typically contains a matrix of finer-grained sediments, such as sand, silt, or clay, which fills the interstices between the clasts. The clasts and matrix are typically cemented by calcium carbonate, iron oxide, silica, or hardened clay.
Chorleywood is both a village and a civil parish in the Three Rivers District, Hertfordshire, on the border with Buckinghamshire, approximately 20 miles (32 km) northwest of Charing Cross. The village is adjacent to the Chiltern Hills Area of Outstanding Natural Beauty and is part of the London commuter belt included in the government-defined Greater London Urban Area. Chorleywood was historically part of the parish of Rickmansworth, becoming a separate ecclesiastical parish in 1845 and a separate civil parish in 1898. The population of the parish was 11,286 at the 2011 census.
Watton-at-Stone is a village and civil parish in Hertfordshire, England, and is midway between the towns of Stevenage and Hertford in the valley of the River Beane.
The Lambeth Group is a stratigraphic group, a set of geological rock strata in the London and Hampshire Basins of southern England. It comprises a complex of vertically and laterally varying gravels, sands, silts and clays deposited between 56-55 million years before present during the Ypresian age. It is found throughout the London Basin with a thickness between 10m and 30m, and the Hampshire Basin with a thickness between 50m and less than 25m. Although this sequence only crops out in these basins, the fact that it underlies 25% of London at a depth of less than 30m means the formation is of engineering interest for tunnelling and foundations.
In geology, the Bagshot Beds are a series of sands and clays of shallow-water origin, some being fresh-water, some marine. They belong to the upper Eocene formation of the London and Hampshire basins, in England and derive their name from Bagshot Heath in Surrey. They are also well developed in Hampshire, Berkshire and the Isle of Wight. The following divisions are generally accepted:
Anstey is a village and civil parish in the East Hertfordshire district of Hertfordshire, England, about 15 miles (24 km) northeast of Stevenage. According to the 2001 census the population of the parish was 338, reducing to 299 at the 2011 census.
The Roxbury Conglomerate, also informally known as Roxbury puddingstone, is a name for a rock formation that forms the bedrock underlying most of Roxbury, Massachusetts, now part of the city of Boston. The bedrock formation extends well beyond the limits of Roxbury, underlying part or all of Quincy, Canton, Milton, Dorchester, Dedham, Jamaica Plain, Brighton, Brookline, Newton, Needham, and Dover. It is named for exposures in Roxbury, Boston area. It is the Rock of the Commonwealth in Massachusetts.
Silcrete is an indurated soil duricrust formed when surface soil, sand, and gravel are cemented by dissolved silica. The formation of silcrete is similar to that of calcrete, formed by calcium carbonate, and ferricrete, formed by iron oxide. It is a hard and resistant material, and though different in origin and nature, appears similar to quartzite. As a duricrust, there is potential for preservation of root structures as trace fossils.
Puddingstone, also known as either pudding stone or plum-pudding stone, is a popular name applied to a conglomerate that consists of distinctly rounded pebbles whose colours contrast sharply with the colour of the finer-grained, often sandy, matrix or cement surrounding them. The rounded pebbles and the sharp contrast in colour gives this type of conglomerate the appearance of a raisin or Christmas pudding. There are different types of puddingstone, with different composition, origin, and geographical distribution. Examples of different types of puddingstones include the Hertfordshire, Schunemunk, Roxbury, and St. Joseph Island puddingstones.
Sarratt is both a village and a civil parish in Three Rivers District, Hertfordshire, England. It is situated 4 miles (6.4 km) north of Rickmansworth on high ground near the county boundary with Buckinghamshire. The chalk stream, the River Chess, rising just north of Chesham in the Chiltern Hills, passes through Sarratt Bottom in the valley to the west of the village to join the River Colne in Rickmansworth. The conditions offered by the river are perfect for the cultivation of watercress. Sarratt has the only commercially operating watercress farm in Hertfordshire. The valley to the east of Sarratt is dry.
Totternhoe Stone is a relatively hard chalk outcropping in the middle of the Lower Chalk in the Chiltern Hills in Hertfordshire, Buckinghamshire, Bedfordshire and Cambridgeshire, England. Geologically, it is located in the upper part of the Cenomanian stage of the Cretaceous.
The Grove is a large hotel in Hertfordshire, England, with a 300–acre (1.2 km2) private park next to the River Gade and the Grand Union Canal. It touches on its north-west corner the M25 motorway and remains a small part in Watford. The estate is situated within three different settlements; most of the land and all of the mansion itself are in the civil parish of Sarratt, and also in the ecclesiastical parish of Langleybury, while the estate lies within the post town of Rickmansworth.
Clothall is a village and civil parish in the county of Hertfordshire, England, with a population of 358. It is situated 2.25 miles (3.62 km) south-east of Baldock, and is in the district of North Hertfordshire. At the 2011 Census the civil parish had a population of 150. The village contains the Church of St Mary the Virgin, which was built of flint and stone around 1350–70, though parts of the church are older, dating to the 12th century.
