At the mouth of a smaller stream, they drove rows of wooden stakes into the mud in the tidal zone.

Because these areas provide a shelter from oceanic currents, these zones share many invertebrate species with the onshore tidal zone.

Frozen water, in the form of glacier ice, covers some 16,000 sqmi of land and 1,200 sqmi of tidal zone.

Glacier ice covers some 16000sqmi km2 of land and 1200sqmi km2 of tidal zone.

Often refuse was placed in unusable areas just outside the city, such as wetlands and tidal zones.