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How do the rocks of the Grand Canyon indicate marine transgressions or regressions?
The rocks of the Grand Canyon showcase a layered sequence of sedimentary deposits that reflect periods of marine transgressions and regressions. During transgressions, sea levels rose, leading to the deposition of marine sediments like limestone, which are found in the canyon's layers. Conversely, during regressions, sea levels fell, resulting in the accumulation of terrestrial sediments such as sandstone and shale. These alternating layers provide a geological record of changing environments over millions of years, indicating the dynamic relationship between land and sea.
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What part of the Australian continent has spent the most time underwater over the last 600 million years?
The eastern part of the Australian continent, particularly in Queensland and New South Wales, has spent the most time underwater over the last 600 million years. This region has experienced several marine transgressions and regressions, resulting in the deposition of marine sediments and the formation of marine fossils.
What does the presence of fossil coral sponges shellfish and trilobites indicate about the past climate of the Grand Canyon area?
The presence of fossil coral, sponges, shellfish, and trilobites in the Grand Canyon area indicates that the region was once covered by a warm, shallow sea. These marine fossils suggest that the climate was much different in the past, likely warmer and more humid, supporting a diverse marine ecosystem.
What is the trench called off the coast of monterey?
The trench off the coast of Monterey is called the Monterey Canyon. It is one of the largest underwater canyons in the United States and plays a crucial role in the region's marine ecosystem, supporting diverse marine life. The canyon's unique topography influences ocean currents and nutrient distribution, making it a significant area for research and conservation.
Torrey Canyon's effect on the environment?
The Torrey Canyon oil spill in 1967 off the coast of Cornwall, England, caused extensive damage to marine life, seabirds, and habitats. The spill resulted in the death of thousands of birds and marine animals, and contaminated beaches and coastal ecosystems. It was one of the world's first major environmental disasters caused by an oil spill.
Does Mud cracks in a shale or mudstone indicate that the mud or clay was deposited in deep waters of an offshore marine environment?
No, mud cracks in a shale or mudstone typically indicate exposure to air and subsequent drying out, which would suggest a shallow water or terrestrial setting rather than deep water offshore marine environment. Deep marine environments are not conducive to mud cracking as the sediments are continuously submerged under water.
What is the meaning of the root word mar?
Mar= sea as in marine marine biologist marfire and etc
What presence would indicate that the land had been uplifted or that sea level had fallen A an estuary B a sea stack C elevated marine terrace D a tombolo?
Elevated marine terrace would indicate that the land had been uplifted, while a tombolo would suggest that sea level had fallen. An estuary is a semi-enclosed coastal body of water where rivers meet the sea, and a sea stack is a tall, vertical column of rock in the sea.
What do elevated marine terraces indicate about a coast?
It is sinking because a marine terraces is sand were sand stacks are, so where the marine terraces are, that's were the water use to be. land had been uplifted or that sea level had fallen
What is the significance of the salt water color in marine ecosystems?
The salt water color in marine ecosystems is significant because it affects the amount of sunlight that penetrates the water. This, in turn, influences the growth of plants and algae, which are the base of the marine food chain. The color of the water can also indicate the presence of nutrients and pollutants, which can impact the health of the ecosystem.
What did the porpoise bones in garbage piles indicate?
The porpoise bones found in garbage piles indicate that ancient humans may have utilized these marine animals as a food source. The presence of these bones suggests that coastal communities engaged in hunting or scavenging porpoises, reflecting their reliance on marine resources. Additionally, the accumulation of these bones in refuse sites can provide insights into the dietary practices and cultural behaviors of past societies.
Which observation best shows that limestone was formed from ocean sediments?
The presence of marine fossils within the limestone is the best observation that shows it was formed from ocean sediments. Marine fossils like shells, corals, or sea creatures preserved within the rock provide direct evidence of its marine origin. Additionally, the presence of ripple marks or cross-bedding in the limestone can also indicate its formation in a marine environment.
How do you find information on a Marine who won a Silver Star on Guadalcanal?
Read his Discharge Documents. The documents will indicate his unit. Obtain the unit history. Read the unit history.
