What is delta made of

sediment, typically silt, that is eroded into a river

Explanation:

Deltas are land forms created at or near the mouths of rivers. They are caused by sediment, typically silt, that is eroded into a river and carried to its mouth, where the sediment is deposited.

When I think of the word 'delta' I typically think of mud, silt, and sand (or, ahem, clastic detritus) as the construction material.

Explanation:

Deltas are accumulations of sediment that form where a river meets a standing body of water. Over time a depositional feature builds out into the body of water. When I think of the word 'delta' I typically think of mud, silt, and sand (or, ahem, clastic detritus) as the construction material.

stewards ice box was the purchase of alaska from russia and it was called that because people thought it was not a good idea to purchase alaska

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals