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Lettris
Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
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Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. You can also try the grid of 16 letters. Letters must be adjacent and longer words score better. See if you can get into the grid Hall of Fame !
English dictionary
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English thesaurus is mainly derived from The Integral Dictionary (TID).
English Encyclopedia is licensed by Wikipedia (GNU).
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definitions
stratum (n.)
1.an abstract place usually conceived as having depth"a good actor communicates on several levels" "a simile has at least two layers of meaning" "the mind functions on many strata simultaneously"
2.one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)
3.people having the same social, economic, or educational status"the working class" "an emerging professional class"
Merriam Webster
StratumStra"tum (?), n.; pl. E. Stratums (#), L. Strata (#). The latter is more common. [L., from sternere, stratum, to spread; akin to Gr. � to spread, strew. See Strew, and cf. Consternation, Estrade, Prostrate, Stratus, Street.]
1. (Geol.) A bed of earth or rock of one kind, formed by natural causes, and consisting usually of a series of layers, which form a rock as it lies between beds of other kinds. Also used figuratively.
2. A bed or layer artificially made; a course.
synonyms
stratum (n.)
bed, class, horizon, layer, layer of the earth, level, rank, seam, social class, socio-economic class
stratum (n.) (geology)
deposit (ellipsis, geology), deposit of ore (geology), layer (geology), layer of the earth (geology), ore deposit (geology)
phrases
Johan van Stratum • Non Access Stratum • Stratum (Netherlands) • Stratum (disambiguation) • Stratum (linguistics) • Stratum basale • Stratum corneum • Stratum germinativum • Stratum granulosum • Stratum intermedium • Stratum lucidum • Stratum lucidum (disambiguation) • Stratum lucidum of hippocampus • Stratum membranosum • Stratum spinosum • Stratum zonale of thalamus • Three stratum theory
analogical dictionary
pellicle; film[Classe]
(geology), (layer of the earth; layer; ore deposit)[Thème]
(ground; terrain), (earth; ground)[Thème]
élément du relief géographique (fr)[DomainDescrip.]
layer of the earth; layer; ore deposit[Classe]
(ground; terrain), (earth; ground)[termes liés]
stratum (n.)
[geology]
condition sociale d'une personne (fr)[Classe]
ensemble de personnes (fr)[Classe...]
(class; social class; socio-economic class; stratum; rank)[Thème]
stratum (n.)
factotum[Domaine]
ContestAttribute[Domaine]
SubjectiveAssessmentAttribute[Domaine]
cognition, knowledge, noesis - forge, form, mold, mould, shape, work[Hyper.]
place - layer - bed, layer, sheet - layer, level, stratum - layer, tier[Dérivé]
stratum (n.)
creature; critter; organism; being[ClasseHyper.]
living creature; living being; organism[ClasseHyper.]
factotum[Domaine]
part[Domaine]
biology[Domaine]
Organism[Domaine]
part, region - arrange, draw up, set up, sort - difference, differentiate, discriminate, distinguish, secern, secernate, separate, severalise, severalize, tell, tell apart - animate thing, living thing[Hyper.]
layer - stratum - stratification - stratification - social stratification, stratification - be, live - organic - organic - organismal, organismic[Dérivé]
population[Desc]
stratum (n.)
condition sociale d'une personne (fr)[Classe]
ensemble de personnes (fr)[Classe...]
divide; divide up; split; split up[Classe]
classer (fr)[Classe]
grouper (fr)[Classe...]
(class; social class; socio-economic class; stratum; rank)[Thème]
Integral Dictionary[Thème]
factotum[Domaine]
Human[Domaine]
pure_science[Domaine]
Classifying[Domaine]
anthropology[Domaine]
SubjectiveAssessmentAttribute[Domaine]
group, grouping, party, set - social organisation, social organization, social structure, social system, structure - folk, people, persons - categorise, categorize, compartmentalise, compartmentalize, label, rubricade - assign, attribute - social group[Hyper.]
human beings, humanity, humankind, human race, humans, man, mankind, world[membre]
people - people - folksy - arrangement, assortment, categorisation, categorization, classification, compartmentalisation, compartmentalization, ranking - sorting - sorter - categorisation, categorization, classification, sorting - brand, description, form, formality, genre, kind, nature, sort, species, variety - categorisation, categorization, classification - class, rank, social class, socio-economic class, stratum - category, class, family - class - class, division - classifier - sorter - sort, sorting, sort-out - classificatory - relegation - classifier - social, societal[Dérivé]
bracket, class[GenV+comp]
plural, plural form - compare, liken[Domaine]
class; social class; socio-economic class; stratum; rank[ClasseHyper.]
Descripteurs EUROVOC (fr)[Thème]
sociology[Domaine]
Group[Domaine]
folk, people, persons - common people, folks, the public[Hyper.]
class structure[membre]
assort, class, classify, divide, separate, sort, sort out, subsume - relegate[Dérivé]
society[Desc]
stratum (n.)
Wikipedia
Stratum
This article is about the geologic use of the term, for other uses see Stratum (disambiguation)
The plural, "strata" redirects to this page. For other senses of that word, see Strata (disambiguation).
Goldenville strata in quarry in Bedford, Canada. These are Middle Cambrian marine sediments. This formation covers over half of Nova Scotia and is recorded as being 29,000 feet thick in some areas.
In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil with internally consistent characteristics that distinguish it from other layers. The "stratum" is the fundamental unit in a stratigraphic column and forms the basis of the study of stratigraphy.
When planning civil engineering projects or other large constructions, the strata of the area where the construction takes place is a significant factor in design decisions. For example if a canal is to be built on a route where the strata are not watertight, the canal will have to be lined with some form of waterproof material (usually clay).
Contents |
Characteristics
The Permian through Jurassic strata in the Colorado Plateau area of southeastern Utah demonstrates the principles of stratigraphy. These strata make up much of the famous prominent rock formations in widely spaced protected areas such as Capitol Reef National Park and Canyonlands National Park. From top to bottom: Rounded tan domes of the Navajo Sandstone, layered red Kayenta Formation, cliff-forming, vertically jointed, red Wingate Sandstone, slope-forming, purplish Chinle Formation, layered, lighter-red Moenkopi Formation, and white, layered Cutler Formation sandstone. Picture from Glen Canyon National Recreation Area, Utah.
Each layer is generally one of a number of parallel layers that lie one upon another, laid down by natural forces. They may extend over hundreds of thousands of square kilometers of the Earth's surface. Strata are typically seen as bands of different colored or differently structured material exposed in cliffs, road cuts, quarries, and river banks. Individual bands may vary in thickness from a few millimeters to a kilometer or more. Each band represents a specific mode of deposition: river silt, beach sand, coal swamp, sand dune, lava bed, etc.
Naming
Geologists study rock strata and categorize them by the material of beds. Each distinct layer is typically assigned to the name of sheet, usually based on a town, river, mountain, or region where the formation is exposed and available for study. For example, the Burgess Shale is a thick exposure of dark, occasionally fossiliferous, shale exposed high in the Canadian Rockies near Burgess Pass. Slight distinctions in material in a formation may be described as "members" (or sometimes "beds"). Formations are collected into "groups" while groups may be collected into "supergroups".
Gallery
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See also
References
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This article does not cite any references or sources. (December 2010) |
External links
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Look up stratum in Wiktionary, the free dictionary. |
