Assertion: spreading ridge | /r/HasProperty | laughton et al.
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Source sentences:
text: Closer to Iceland the ridge axis shallows and the axial valley is replaced by a robust axial high more characteristic of a fast-spreading ridge (Laughton et al., 1979; Murton and Parson, 1993; Parson et al., 1993; Searle et al., 1998; Fig. 2).