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  2. Stratigraphy - Wikipedia

    en.wikipedia.org/wiki/Stratigraphy

    These variations provide a lithostratigraphy or lithologic stratigraphy of the rock unit. Key concepts in stratigraphy involve understanding how certain geometric relationships between rock layers arise and what these geometries imply about their original depositional environment.

  3. List of variations on Pachelbel's Canon - Wikipedia

    en.wikipedia.org/wiki/List_of_variations_on...

    Suzannah Clark, a music professor at Harvard, connected the piece's resurgence in popularity to the harmonic structure, a common pattern similar to the romanesca.The harmonies are complex, but combine into a pattern that is easily understood by the listener with the help of the canon format, a style in which the melody is staggered across multiple voices (as in "Three Blind Mice"). [1]

  4. Category:Song forms - Wikipedia

    en.wikipedia.org/wiki/Category:Song_forms

    Alemannisch; العربية; Azərbaycanca; Беларуская (тарашкевіца) Cymraeg; Deutsch; Eesti; Español; Esperanto; فارسی; Ido; Italiano ...

  5. Song structure - Wikipedia

    en.wikipedia.org/wiki/Song_structure

    Song structure is the arrangement of a song, [1] and is a part of the songwriting process. It is typically sectional, which uses repeating forms in songs.Common piece-level musical forms for vocal music include bar form, 32-bar form, verse–chorus form, ternary form, strophic form, and the 12-bar blues.

  6. Chemostratigraphy - Wikipedia

    en.wikipedia.org/wiki/Chemostratigraphy

    Chemostratigraphy, or chemical stratigraphy, is the study of the chemical variations within sedimentary sequences to determine stratigraphic relationships. The field is relatively young, having only come into common usage in the early 1980s, but the basic idea of chemostratigraphy is nearly as old as stratigraphy itself: distinct chemical signatures can be as useful as distinct fossil ...

  7. Variation (music) - Wikipedia

    en.wikipedia.org/wiki/Variation_(music)

    In music, variation is a formal technique where material is repeated in an altered form. The changes may involve melody, rhythm, harmony, counterpoint, timbre, orchestration or any combination of these. Variation is often contrasted with musical development, which is a slightly different means to the

  8. '50s progression - Wikipedia

    en.wikipedia.org/wiki/'50s_progression

    This is a partial list of recorded songs containing the '50s progression. The list does not include songs containing the progression for very short, irrelevant sections of the songs. In some cases, such as " Blue Moon ", it includes notable remade recordings of songs (" covers ") by other artists; but mostly the songs are shown in their ...

  9. List of Global Boundary Stratotype Sections and Points

    en.wikipedia.org/wiki/List_of_Global_Boundary...

    This is a list of Global Boundary Stratotype Sections and Points.Since 1977, Global Boundary Stratotype Sections and Points (abbreviated GSSPs) are internationally agreed upon reference points on stratigraphic sections of rock which define the lower boundaries of stages on the geologic time scale.

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