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  • Specimen of the Week 317: The Belemnite Fossil

    By Nadine Gabriel, on 17 November 2017

    Hello everyone, it’s Nadine Gabriel with another mollusc for you in this week’s Specimen of the Week. This specimen is a member of an extinct order of cephalopods that lived from the Triassic period (250-201 million years ago) through to the end of the Cretaceous period, becoming extinct around the same time as non-avian dinosaurs (~66 million years ago). These cephalopods were very common in the ancient oceans so they’re quite abundant in Jurassic and Cretaceous deposits all over the world. However, since the preservation of soft tissues is rare, it’s usually just the bullet-shaped rostrum that’s preserved. Not so in this week’s Specimen of the Week… (more…)

    Specimen of the Week 311: Banded Snails

    By Nadine Gabriel, on 6 October 2017


    Hello everyone, it’s Nadine Gabriel again. My specimen of the week is a bit of an unusual one because there are 26 of them and they’re alive! This tank of banded snails features in our new exhibition, the Museum of Ordinary Animals. Banded snails were used in 20th century genetic studies as a key model for natural selection. For the next few months, I’ll be known as the “keeper of the snails” and I would like to introduce you to these marvellous molluscs.

    snail_tank_1

    Banded snails in their tank

    (more…)

    Specimen of the Week 305: The Horned Screamer

    By Nadine Gabriel, on 25 August 2017

    Hello everyone, it’s Nadine Gabriel. I’ve been a familiar face at the Grant Museum over the years and I have recently started an internship here – I’m really looking forward to another year at the museum! Over the past few months, I’ve been accessioning objects in the display cabinets high up in the museum and I have come across many interesting specimens. However, one mounted skeleton with a striking pose really stood out to me and it’s also the only specimen of its species in the Grant Museum. Let’s make some noise for the horned screamer!

    Articulated skeleton of a horned screamer (Anhima cornuta) LDUCZ-Y519

    Articulated skeleton of a horned screamer (Anhima cornuta) LDUCZ-Y519

    (more…)

    Fun with Minerals 2: Back in the Habit

    By Subhadra Das, on 15 September 2016

    UCL Earth Sciences student and veteran of UCL Geology Collections curation Nadine Gabriel returns with another guest blog relating her work with the mineral collection over the summer. It’s great to have her back and to demonstrate that collections management is clearly habit forming.

    Hello, it’s Nadine Gabriel again and I’ve been spending another summer working with UCL Geology Collections. Since the Rock Room will soon have another home, I’ve been removing minerals from display cabinets, auditing the collection and accessioning some new specimens. Once again I have seen thousands of minerals and one thing that always catches my eye is the wide variety of habits, so I thought this topic would make a great sequel to my first blog.

    A mineral habit is the shape of a single crystal or group of crystals. This is dependent on a mineral’s crystallographic system (the atomic arrangement of a crystal) and its growing conditions. The basic habit classification is defined by how well-formed a crystal is. A mineral is euhedral if all faces are well-developed, which means it grew in uncrowded, optimal conditions. However, if a mineral grew in unsuitable conditions, it becomes subhedral (some faces present) or anhedral (no faces). Below are the more specific habit classifications.

    First up is the massive habit which contains no visible crystal structures, but don’t assume that this doesn’t make them less eye catching! Many beautiful minerals such as deep blue lapis lazuli and vivid red (but poisonous) cinnabar have this habit.

    Minerals with cubic habit

    Cubic: pyrite, fluorite and galena (top). Hexagonal: quartz (middle left) and aragonite (middle right). Platy: biotite (bottom left) and talc (bottom right)

    (more…)

    Fun with Minerals

    By Nicholas J Booth, on 8 October 2015

    This is a guest post by Nadine Gabriel, a UCL student and volunteer with UCL Museums. All photos by the author.

    Hello there, I’m Nadine Gabriel and I’ve been working with the UCL Geology Collections for just over a year. Towards the end of the summer holidays, I was given the chance to audit the thousands of mineral specimens in the Rock Room to ensure that we have a record of what is (and isn’t) in the collection. While auditing the collection, I handled a wide variety of specimens and learnt about new minerals and their classification – I’ve come across so many minerals that I’ve never heard of, even after doing two years of geology. But the best thing about working with the collection was saying ‘ooh’ and ‘ahh’ every time I saw a nice shiny mineral.

    Heart Minerals - calcite and malachite.

    Heart Minerals – calcite and malachite.

    When I first started working with the geological collections, my audits involved working with Excel spreadsheets and paper catalogues filled with entries from way before I was born. (more…)