21. As a result, the world-famous St . Mark's Square stands just 2 inches above the normal high-tide level . 22. Ownership of Aboriginal land adjoining marine waters in the Northern Territory generally extends to the low tide level . 23. Average tide level limits their height. 24. It is found shallowly buried in fine sand, and muddy sand, beaches at and below low tide level . 25. It is usually found on the edge of forests, but also at the high tide level close to mangroves. 26. The shoreline consists of generally steep storm beaches of pebbles, although fine sand is visible at low tide levels . 27. Such tides can exceed normal levels by more than, with the highest tide level of observed on 4 November 1966. 28. The maximum elevation on the island is no more than 10 feet ( 3 metres ) above the high tide level . 29. Hardgrounds are hard crusts of carbonate material that form on the bottom of the ocean floor, below the lowest tide level . 30. They allowed to known the direction of tidal currents, and to calculate tide level depending on the phase of the moon.
