They differ somewhat from bathymetric charts which are virtually topographic maps of the ocean floor.它们与水深图稍有不同,后者实际上是洋底地形图.In bathymetric survey, the recorded seabed is distorted due to the beam - width of the echo soun...
Hornblende bearing varieties bridge the gap over to amphibolites which are in bands and dikes.含角闪石的变种填补了带状和脉状角闪岩的中间相.Mineral constituents consist mainly of jadeite, aegirine - augite, magnesio - riebeckite, winchite , ma...