William Haviland, Dana Walrath, Harald Prins, Bunny McBride, Evolution and Prehistory: The Human Challenge, p. 166

Llanite– Type of mineral – A hypabyssal rhyolite with microcline and blue quartz phenocrysts from the Llano Uplift in Texas Boggs, S., 2006, Principles of Sedimentology and Stratigraphy (4th), Pearson Prentice Hall, Upper Saddle River, N.J., p. 662 Soils also provide a home (or habitat) for a range of creatures. Earthworms and many bugs live in the soil while rabbits and moles, for example, dig their homes underground in the soil. Earthworms are important in the maintenance of soil as they aerate it (add air to it). Words to know: Other Recommended Aquarium Decorations are our Aquarium Gravel by Pure Water Pebbles ®. Pure Water Pebbles ®aquarium gravel is great for aquariums, ponds, gardens and architectural surfaces. Heat sanitized, hand washed, safe for your fish, and ready to be added to your aquarium.Bjorhovde, Reidar (2004). "Development and use of high performance steel". Journal of Constructional Steel Research. 60 (3–5): 393–400. doi: 10.1016/S0143-974X(03)00118-4.

Although it has other uses (such as underlayment for patios), crushed stone is especially useful in mulching around certain types of plants and in creating a patch of yard where dogs will be kept. Dogs can destroy a lawn. In contrast with grass, crushed stone offers a low-maintenance option that minimizes the mess dogs make through digging, urination,and wear and tear. The inspiration for the unofficial anthem of Yorkshire ‘On Ilkla Moor Baht ‘at’, Ilkley Moor spans 676 acres of green space between Ilkley and Keighley. Sitting at 402 metres above sea level, it offers picture-perfect panoramas of the Yorkshire Dales. Cross the heather-strewn countryside to discover landmarks like The Ilkley Crags and The Twelve Apostles Stone Circle – Yorkshire’s answer to Stonehenge! a b c d e f Blatt, Harvey; Tracy, Robert J. (1996). Petrology (2nded.). W.H. Freeman. ISBN 978-0-7167-2438-4. O'Hara, Kieran D. (2018). "The Structure of Geological Revolutions". A Brief History of Geology (1ed.). Cambridge University Press. pp.247–259. doi: 10.1017/9781316809990.013. ISBN 978-1-316-80999-0. Available at stone yards, you'll probably need to have boulders delivered to your property. If you've hired landscapers for the installation, they'll make the necessary arrangements.

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A huge collapsed cavern on the west side of Pen-y-Ghent, Hull Pot is one of Yorkshire’s more intriguing natural wonders. The chasm is 300-foot long, 60-foot wide and 60-foot deep. It even holds the record for England’s largest natural hole! In heavy rain, the stream at the top pours over the lip of the pot, creating a spectacular waterfall. In really stormy weather, the flood waters have actually filled the Hull Pot to the brim! Freestone, Ian (1 January 1991). "Forgotten but not lost: the secret of Coade Stone". Proceedings of the Geologists' Association. 102 (2): 135–138. Bibcode: 1991PrGA..102..135F. doi: 10.1016/S0016-7878(08)80072-7. ISSN 0016-7878. Spurn Point is simply magnificent. A star attraction off the tip of the coast, it’s a constantly moving peninsula between the Humber Estuary and the North Sea. No two days are ever the same at Spurn Point – you can see Yorkhire’s only tidal island when the tide comes in across the Holderness Coast, or when the tide is out, trek along the 3.5 mile long tip. If you take an early morning trip, you can spot roe, foxes and more. Condie, Kent C. (2015). Plate Tectonics & Crustal Evolution (2nded.). New York: Pergamon. p.68. ISBN 9781483100142 . Retrieved 13 April 2020.

Color choices are more subjective. But the discriminating designer relishes opportunities to incorporate color so as to achieve matches, create interesting contrasts, etc.The number of micro-organisms found in a cup of soil is greater than the number of people on Earth. Boggs, Sam (2006). Principles of sedimentology and stratigraphy (4thed.). Upper Saddle River, N.J.: Pearson Prentice Hall. ISBN 0131547283. Nesse, William D. (2000). Introduction to mineralogy. New York: Oxford University Press. ISBN 9780195106916.

Blatt, Harvey and Robert J. Tracy, Petrology, W.H.Freeman, 2nd ed., 1996, p. 355 ISBN 0-7167-2438-3 If the sediments remain at the place of origin then the formed deposits are known as residual deposits. Some sediments formed by various chemical reactions such as decomposition, precipitation, evaporation, etc. give rise to the formation of chemical deposits. Similarly, the sediments formed by the action of various organisms such as plants and animals are known as Organic deposits. Lillie, Robert J. (2005). Parks and plates: the geology of our national parks, monuments, and seashores (1sted.). New York: W.W. Norton. ISBN 0393924076.Flamborough Head, Bridlington, East Riding of Yorkshire, YO15 1AR & RSPB Bempton Cliffs, Cliff Lane, Bempton, Bridlington, North Yorkshire, YO15 1JF. Ilkley Moor A mineral is a naturally occurring substance with distinctive chemical and physical properties, composition and atomic structure. Gajul, Shekhar (28 July 2018). "Underground Mining Equipment Market 2017 Global Key Players, Share, Challenges, Industry Size, Growth Opportunities & Forecast To 2021". Journalist Book. Archived from the original on 28 July 2018 . Retrieved 28 July 2018. As tiny skeletal fragments from coral, shellfish, and plankton accumulate on ocean floors, they fuse over time into solid limestone. Chalk varieties stem from particularly fine-grained planktonic remains, while fossil-rich limestone often forms in shallow reef environments.