# Tag Info

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Thanks to @Eartworm I learned today I was totally incorrect: the straits are more than 2000 meters deep. Tool to see bathymetry, navionics.com

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Theoretically? Maybe! Practically? No. Identifying the general quarry site by comparing lithology is often possible. It might be possible to identify a block as coming from a particular level in a quarry by detailed characterisation of micro-fossil assemblages. Geochemical analyses could assist. However the practical problems are almost certainly ...

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The reason the Holocene began about 12000 years ago was because that was when Northern Hemisphere summers were hot but short. Those hot summers started a melting process. Right now, July is when the Earth is furthest from the Sun. This makes Northern Hemisphere summers long but mild. That is one of the key conditions that enables a glaciation to start. In ...

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I'm studying Earth Science right now, and I found conflicting reporting re: the formation of the Grand Canyon; whether it was formed singularly by the Colorado River over millions of years, or if it was formed by other processes with the river only filling into it relatively recently. Yes, it was formed by other processes with the river only excavating into ...

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Crude oil is a product of partial degradation of organic matter, e.g. of plants that lived long time ago. During photosynthesis, they constantly incorporate carbon (from $\ce{CO2}$) to accumulate biomass. But carbon is not uniform, it consists of different isotopes, and a tiny fraction of radioactive $\ce{^{14}C}$. Slowly, over time (with a half-life of \$\...

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They microscopically examine drill debris to determine if they are in the target formation , typically coral/marine shells. This is not done for all wells but for exploratory and step-out wells ( expanding a field). Primary interests are gas/oil ratio, hydrocarbon/water ratio, sulfur level. Age is only of interest as it gives information of the other ...

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