Types of gravel include: 1  Bank gravel: naturally deposited gravel intermixed with sand or clay found in and next to rivers and streams. 2  Bench gravel: a bed of gravel located on the side of a valley above the present stream bottom, indicating the former location of the stream bed when it was at a higher level.
1 is the sixth part of 6. 2 is two sixths, and also the third part, of 6. 3 is three sixths, and also half of 6. 4 is four sixths, and also two thirds, of 6. is the sixth part of 6. 2 is two sixths, and also the third part, of 6. 3 is three sixths, and also half of 6. 4 is four sixths, and also two thirds, of 6.
In the first inversion of a C major triad Play (helpÂ·info) , the bass is Eâthe 3rd of the triadâwith the 5th and the root stacked above it (the root now shifted an octave higher), forming the intervals of a minor 3rd and a minor 6th above the inverted bass of E, respectively.irst-inversion triads (6-3) are customarily abbreviated as 6, i.e. presence of the 3rd is understood. Second-inversion triads (6-4) are not abbreviated. Root-position seventh-chords, i.e. 7-5-3, are abbreviated as 7. First inversion seventh-chords 6-5-3, are abbreviated as 6-5.