Been looking at seismic lines everyday this week for my advanced sequence strat course. Made me realise that I think I want to go into petroleum after my masters.
However, all the lines and 9-5 everyday thats been happening this week is starting to make us all go a bit retarded and silly.
So much so that several people wore pyjamas to the class today.
Seismic lines (2D ones that is) is pretty much, 99%, only used in petroleum (although some researchers use them to look at deep structures and Earth science phenomenum like the Moho).
For all those who are interested, this is the sort of shit we’ve been doing, e.g. using seismic lines in stratigraphy to interpret past environments, sea level, tectonics, etc. BUT we’ve also been analysing areas for source rocks, reservoirs, traps, etc. for hydrocarbons:
Had a meeting with my project advisor today, and basically I’m going to looking how different lithologies of bed-load sediments affect the longitudinal profiles of rivers and the impact rivers have on the environment.
At least I think that is what it’s on.
He later went on to say that I could even include how different lithologies affect sedimentary basins (which is more of a geological thing to look at) as then you can look at a present-day sedimentary basin (or do other basin analysis) and have a better idea of the river system.
I think that’s my project.
This is all going to be using a mathematical model in a spreadsheet, so no faffing around booking equipment or costs and other things.
Got a first for my field slips/maps from my summer mapping project and a 2.1 for my cross section, just the report to do now :) So happy
or when igneous petrologists trick students in to thinking you will never need to graphic log igneous rocks THEN BAM!
PDCs are pretty to cool to look at, pretty shit to be stuck in one.
In essence, they are a combination of very very hot gases and debris from the volcano (range of sizes from ash to tuff to pebbles to large minerals that have been scraped off the sides of the volcano and are just ejected out).
When PDCs turn in to rocks by wizards, these are called ignimbrites, which can have a range of textures depending upon the PDC which formed it (google ignimbrite grade continuum or read Branney & Kokelaar 1991).
This is a Light microscope image of a welded ignimbrite, composed of eutaxitic lapilli-tuff as seen in thin section (Long dimension is several mm). The glass shards (mostly brown) sometimes become welded together when the deposit is still hot, and can be deformed by flow and compaction about crystal fragments (clear).
Here is one showing a fiamme texture:
Today I turn 22. I thought about revising, but thats obviously not happening as that would be silly.
Have a fun day geologising.