The smaller folds are like “little fleas on bigger fleas on bigger fleas” in that many little folds may be superimposed on larger ones. These anticlines and synclines range in amplitude from fractions of an inch to thousands of feet. Many are miniature anticlinoria themselves and could be used as scale models of the structure of the entire mountain range. The small folds, or crenulations, in the schist have weathered differentially so that the more resistant layers stand out in relief, emphasizing the shape of the folds. The photograph in Figure 4 shows the small-scale folding. It will be noted that the anticlinal folds are asymmetrical with the west side dipping more steeply than the east side. If a comparison is made between the structure of the mountain and that of an asymmetrical arch, to carry the simile one step further, it may be imagined that the axis of the arch may be either horizontal or inclined. The chances that it is inclined are much greater than the chance that it is exactly horizontal. Thus, most anticlines or anticlinoria are inclined along their axes and the amount of the dip of the line connecting the points along the crest of the fold is called the _plunge_. Most of the folds in the Mount Mansfield area plunge about ten degrees to the south. This plunge is expressed in the dip of the crests of the minor folds, particularly in the crenulation of the mica layers. Viewed at a distance the trace of the fold-crests form a series of parallel lines on the smooth mica-rich surfaces. This type of structure is called the _lineation_ and is expressed on the geologic map by small arrows. The dominant lineation is north-south. Although Figure 5 is a sketch of a small fold showing the different structural elements, it might be taken as a diagrammatic sketch of the regional structure. Evidence that the structure of the rocks is even more complex is shown locally by the presence of east-west lineations. The intersection of this secondary lineation with the dominant south lineation produces a checker board appearance on some rock surfaces. A system of east-west trending folds is traced by some of the quartz lenses. The significance of the east-west structures is hypothetical, but they are believed to have been mostly obscured by the younger structural features. [Illustration: Figure 4. Folding and crenulations in the mica-albite-quartz schist near the Chin on Mount Mansfield. As the photograph is looking to the north, it may be noted that the folds are asymmetrical with axial plane of the folding dipping east.]