Should I be linking to you?

Janet tells me that it’s Blogroll Amnesty Day:

I think that the blogosphere is (or could be) different from media wherein news and commentary is “broadcast” to an audience by allowing back and forth communication — the kind of thing that works best when there’s a healthy community of people taking part in the conversation.

I want to hear the voices that are new to the conversation, or the ones that are speaking in the quieter corners that the high-traffic bloggers sometimes don’t notice. I want to hear from people whose experiences have differed from my own in interesting ways. (This is not to say that I don’t want to be in conversation with people who have had similar experiences — that’s important in a community, too.) I don’t want blogospheric hierarchies telling me who’s worth reading any more than I want network news producers telling me what stories I should care about.

Help me find the blogs that I ought to be reading. (This may include your blog — don’t be shy about telling me so!)

It’s been a while since I updated my blogroll to take account of the changes in the geoblogosphere, so I’ve just gone through and added some of the newer additions to the feed (and, of course, taken account of Yami/Maria’s assimilation into the Scibling fraternity, which I’m very excited about). But there are probably people that I’m missing off one, or both, so let me know if your rock blogging is not being properly advertised. I’m sure there’s also lots of academic and more generally sciency blogs that I’m reading, or should be reading, or should be returning the link-love to, so feel free to nag away.

Categories: bloggery, links

Into the Bushveld #1: holy hunks of magnetite!

As a palaeomagician, there’s an intrinsic interest in having a huge hunk of magnetite (well done to those who eventually worked it out) on one’s desk, even if I’m going to have to be careful not to put it near any of my samples (or my credit cards, for that matter). But how has such a thing come to form? Normally magnetite is a fairly minor component of igneous rocks, and of sediments that are derived from them; what process has produced such a concentrated mass of it? Perhaps taking a closer look of the original sampling locality will gives us a few clues:

Main Magnetite Layer, Bushveld

Continue reading

Categories: fieldwork, geology, volcanoes

A further clue to the mystery deskcrop

Some of you are on the right sort of track to the answer to Friday’s geopuzzle, but I think that I can clear up the uncertainties considerably by demonstrating exactly why this particular rock is staying well away from my lab.
Here’s an innocent compass:

compass.jpg

And here’s what happens when my new deskcrop is placed nearby:

compassrock.jpg

One of my companions on last week’s trip suggested that we could have a lot of fun trying to get first year undergraduates to measure the bedding orientation in the locality this sample was retrieved from. How deliciously evil.

Categories: geology

Blessed are the commentators

This blog reached a minor milestone whilst I was away: Brian’s comment on my post about the geological carnage in Kashmir was the 1,000th comment to be posted since I moved to ScienceBlogs. Note that he was agreeing with me. That’s because everyone always agrees with me in the comments, and not just because I delete the malcontents.
Seriously, though, to have so much feedback and discussion inspired by my writing, particularly from the diverse band of regular geoblogospherians who have taken to hanging around here, is one of the best things about blogging, and not just because it boosts my ego: this site wouldn’t be half as good without all of you popping up to provide clarifications, corrections and questions. So, thank you, and I hope that you continue to loiter.

Categories: bloggery

Geopuzzle #3

I’ve been out in the field for the past couple of days (the South African weather having picked up just in time to completely fry me), and my travels have yielded me a deskcrop that I’m very proud of:

gp3a.jpg

What do you think it is? Just to show that I’m not completely heartless, here’s a picture of the outcrop from which it was obtained:

gp3b.jpg

This is potentially pretty difficult, so I may post another clue over the weekend. Go to it in the comments.

Categories: fieldwork, geology