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Creationists have often told me that all sedimentary rock was formed during the Flood. That is one reason they see no reason for rock formation taking place slowly over millions of years. Sedimentary rock certainly isn’t rare, it accounts for 70% of the Earth’s crust.
If forty days and nights of rain led to a worldwide Flood with no land remaining, one thing is clear. Those raindrops would absorb oxygen on the way down. In addition, creationists tell us that canyons and river valleys were formed by tumultuous Floodwaters shaping the landscape. Waves of flood waters crashing against mountains, hills, plateaus, and masses of sand and dirt would mean more opportunity for oxygen to be dissolved in the waters.
Black Shale is a sedimentary rock, and it forms when there is very little oxygen around, in an oxygen-depleted environment. It also forms in water that is slow-moving or stagnant.
“A black color in sedimentary rocks almost always indicates the presence of organic materials. Just one or two percent organic materials can impart a dark gray or black color to the rock. In addition, this black color almost always implies that the shale formed from sediment deposited in an oxygen-deficient environment. Any oxygen that entered the environment quickly reacted with the decaying organic debris. If a large amount of oxygen was present, the organic debris would all have decayed. An oxygen-poor environment also provides the proper conditions for the formation of sulfide minerals such as pyrite, another important mineral found in most black shales.”
--Shale: Sedimentary Rock - Pictures, Definition & More
“Shales are typically deposited in very slow moving water and are often found in lakes and lagoonal deposits, in river deltas, on floodplains and offshore from beach sands. They can also be deposited in sedimentary basins and on the continental shelf, in relatively deep, quiet water.”
“‘Black shales’ are dark, as a result of being especially rich in unoxidized carbon. Common in some Paleozoic and Mesozoic strata, black shales were deposited in anoxic, reducing environments, such as in stagnant water columns.”
--Shale | Properties, Composition, Formation, Uses » Geology Science
If creationists are right, black shale shouldn’t exist. Yet it is actually the “source rock” for petroleum and natural gas.
If forty days and nights of rain led to a worldwide Flood with no land remaining, one thing is clear. Those raindrops would absorb oxygen on the way down. In addition, creationists tell us that canyons and river valleys were formed by tumultuous Floodwaters shaping the landscape. Waves of flood waters crashing against mountains, hills, plateaus, and masses of sand and dirt would mean more opportunity for oxygen to be dissolved in the waters.
Black Shale is a sedimentary rock, and it forms when there is very little oxygen around, in an oxygen-depleted environment. It also forms in water that is slow-moving or stagnant.
“A black color in sedimentary rocks almost always indicates the presence of organic materials. Just one or two percent organic materials can impart a dark gray or black color to the rock. In addition, this black color almost always implies that the shale formed from sediment deposited in an oxygen-deficient environment. Any oxygen that entered the environment quickly reacted with the decaying organic debris. If a large amount of oxygen was present, the organic debris would all have decayed. An oxygen-poor environment also provides the proper conditions for the formation of sulfide minerals such as pyrite, another important mineral found in most black shales.”
--Shale: Sedimentary Rock - Pictures, Definition & More
“Shales are typically deposited in very slow moving water and are often found in lakes and lagoonal deposits, in river deltas, on floodplains and offshore from beach sands. They can also be deposited in sedimentary basins and on the continental shelf, in relatively deep, quiet water.”
“‘Black shales’ are dark, as a result of being especially rich in unoxidized carbon. Common in some Paleozoic and Mesozoic strata, black shales were deposited in anoxic, reducing environments, such as in stagnant water columns.”
--Shale | Properties, Composition, Formation, Uses » Geology Science
If creationists are right, black shale shouldn’t exist. Yet it is actually the “source rock” for petroleum and natural gas.