Chester Keeler Wentworth was born in Aspen, Colorado, on May 7, 1891, one of five children of Frank Louis Wentworth and Anna Maria Keeler Wentworth. Chester graduated from the University of Chicago with an A.B. degree in geology in June 1918. Chester took his M.S. degree in 1921, and his Ph.D. in 1923, both at the University of Iowa. It was during his time as a student at Iowa that Chester’s unusual combination of aptitudes led to the achievement for which he is most widely known — the Wentworth scale for the classification of clastic sedimentary rocks.
Chester K. Wentworth, Fellow of The Geological Society of America since 1923, died in Hilo, Hawaii, on January 6, 1969, after several years of illness. He is survived by his widow, Juliette Oliveira Wentworth, and by two sons by a former marriage, Robert and Gordon. Another son, Thomas, was killed in France in 1944.
The original scale was devised in 1898 by the American sedimentary petrologist J.A. Udden was adapted (1922) by C.K. Wentworth, who expanded the definitions of the various grades to conform with actual usage by researchers; most sedimentologists have adopted the Udden scale with the Wentworth modifications.
Grain size
Grain size scale, in sedimentology, division of a continuous range of particle sizes into a series of discrete groups. Several such scales have been devised for the purpose of standardizing terms and providing a basis for statistical analysis. On most scales, the finest particles are designated clay, followed by silt, sand, granules, gravel, pebbles, cobbles, and boulders. The size limits for each grade vary from scale to scale.
In order to claim a find in this EarthCache you have to get yourself to the coordinates supplied. There, answer the following three (3) questions:
1. Using the Wentworth Scale in the listing classify the beach sand (sediment) according to grain size.
2. Examine the sediment composition closely and tell me whether the sediment if mono (only one type of material) or multimineralic (more than one type of material)?
3. Do you see evidence of the presence of shell fragments? Yes or no?
If you feel you have all the answers correct, please log your found but also send me the answers via e-mail so I can check them. If I don’t answer you it is because they are correct and you have another found.Please note that when you e-mail me, please supply the reference (GC7E5A3) and name [Wentworth en La Concha - DP/EC uno-cero-cuatro] of the cache and please click on the “I want to send my e-mail address along with this message” so that when I reply to you the messages don’t go into e-mail heaven (or hell).
The Beach of La Concha, Spanish: Playa de La Concha [ˈplaʝa ðe la ˈkoɲtʃa]) is a beach in the Bay of La Concha (Shell, in Spanish, due to its shape) in San Sebastián (Basque Country). It is one of the most famous urban beaches in Europe.
It is a sandy beach and shallow substrate, in which the tide fluctuation affects greatly the area available for use. It can be considered an urban beach in widespread use.
Chester Keeler Wentworth nació en Aspen, Colorado, el 7 de mayo de 1891, fue uno de los cinco hijos de Frank Louis Wentworth y Anna Maria Keeler Wentworth. Se graduó en geología de la Universidad de Chicago en junio de 1918. Chester completó su maestría en 1921 y su doctorado en 1923, ambos en la Universidad de Iowa.
Fue durante su tiempo como estudiante en Iowa que la combinación inusual de las habilidades de Chester lo llevó al descubrimiento y la elaboración por la cual es más conocido, una escala que clasifica las rocas sedimentarias clásticas, que obtuvo su nombre Scale Wentworth.
Chester K. Wentworth, miembro de la Sociedad Geológica de América desde 1923, murió en Hilo, Hawai, el 6 de enero de 1969, después de varios años sufriendo una enfermedad que dictaba su fin.
La escala original fue desarrollado en 1898 por el sedimentaria de EE.UU. aceite J.A. Udden fue adaptado (1922) por C. K. Wentworth, que se expandió las definiciones de las diferentes categorías para ajustarse a uso real por los investigadores; La mayoría de los sedimentólogos adoptaron la escala de Udden con las modificaciones de Wentworth.
Tamaño de un grano
Escala de grano, en sedimentología, división de un rango continuo de granulometría en una serie de grupos discretos. Varias de estas escalas fueron diseñadas para estandarizar términos y proporcionar una base para el análisis estadístico. En la mayoría de las escalas, las partículas más finas se designan arcilla, seguido de limo, arena, granulado, grava, piedras, guijarros y rocas. Los límites de tamaño para cada clase varían de una escala a otra.
Para reclamar un descubrimiento en este EarthCache, debe ir a las coordenadas provistas. Responde las siguientes tres (3) preguntas:
- Usando la Escala de Wentworth en el listado, clasifique la arena de la playa (sedimento) de acuerdo con el tamaño del grano.
- Examine la composición del sedimento de cerca y dígame si el sedimento es monomineral (solo un tipo de material) o multimineral (más de un tipo de material).
- ¿Ves evidencia de la presencia de fragmentos de conchas? ¿Si o no?
¡Disfruta la playa!
The most exciting way to learn about the Earth and its processes is to get into the outdoors and experience it first-hand. Visiting an Earthcache is a great outdoor activity the whole family can enjoy. An Earthcache is a special place that people can visit to learn about a unique geoscience feature or aspect of our Earth. Earthcaches include a set of educational notes and the details about where to find the location (latitude and longitude). Visitors to Earthcaches can see how our planet has been shaped by geological processes, how we manage the resources and how scientists gather evidence to learn about the Earth. To find out more click HERE.