Late Holocene vegetation and palaeoenvironmental history of the Dunadd area,Argyll, Scotland: chronology of events

This paper focuses on the chronology and environmental significance of a sediment sequence from an alluvial locality in the vicinity of the historic site of Dunadd, Scotland. It outlines the rationale and statistical validity of an age model derived for a sequence of floodplain sediments from which detailed pollen-stratigraphical and plant macrofossil records have been derived. A series of radiocarbon dates are calibrated using a Bayesian modelling approach, the results of which can be refined by incorporating two independent age estimates based on tephra layers of known age. Analysis of the entire floodplain sequence for volcanic glass shards revealed the presence of discrete but geochemically very similar tephra layers within the upper (late Holocene) part of the sequence. Comparison with published geochemical data obtained from Icelandic tephras of historical age indicates strong statistical correlations with the Hekla 1947 AD and Hekla 1510 AD. While the Hekla 1510 AD tephra has previously been reported from sites within Britain and Ireland, the Dunadd sequence affords the first record of the Hekla 1947 AD tephra layer within Scotland. When the ages and stratigraphic positions of both tephra layers are incorporated into the Bayesian age model, an overall centennial to decadal precision for the late Holocene is achieved, with archaeological and environmental transitions discriminated with highest-likelihood age uncertainty ranges of 20–50 years at 95% confidence. The local environmental record is assessed in the light of this new chronological framework: the data support previously reported proposals for two periods of significant climatic deterioration with increased wetness, the first during the early Medieval period and the second during the late 16th and 17th centuries AD.     

Children, ‘healthy’ food,school and family: the ‘[n]ot really’ outcome of school food messages

ABSTRACT

This paper draws on a multi-method study with 50 families in Victoria, Australia. Primary school children were asked about food knowledge from school and whether they felt motivated to bring knowledge home. Generally, children and parents felt school food messages are unclear, contradictory and not relevant to them and this reduced the likelihood of messages coming home from school. We identify a critical difference in how families thought about healthy eating and food practices at home and the framework of school messages. Families focused on children’s eating in a pragmatic way, infused with nurturance as well as concern. We argue their practices can be viewed as a form of relational consumption (Lindsay and Maher 2013. Consuming Families: Buying, Making, Producing Family Life in the Twenty-First Century. New York: Routledge.) where food is part of the everyday exchange of love and care. A disjunction exists between familial relational approaches and the regulatory framework of school food messages that impacts how messages move between these spaces. Attention to relational aspects of food consumption at school might allow for a more valuable exchange between family and schools that supports family endeavours to feed children well.     

Ammonoids and the correlation of the Lower Carboniferous rocks of eastern Australia

The occurrence of ammonoids in the Lower Carboniferous rocks of eastern Australia is reviewed within a biostratigraphic framework provided by the brachiopod zones that have been summarized most recently by Jones & Roberts (1976). Ammonoid abundance is low at all stratigraphic levels. Nowhere are more than 20 specimens known at a locality, and usually there are only one or two. The group is too sparse to be used for local or regional correlation, and its main value is for the intercontinental correlation of a number of well separated horizons. The rocks dated range in age from middle Tournaisian (Tn_2a) to late Visean V_3c). Some relatively minor differences between ammonoid and conodont ages remain to be resolved. The biogeography is briefly discussed.

The type specimens of all available previously described species have been examined and where necessary they are re-illustrated. New species described are Irinoceras tuba, Muensteroceras jenkinsi, M. delepinei, M. merlewoodense, Beyrichoceras mackellari, B. bootibootiense, Nomismoceras pseudocyclus, Goniatites mundubberensis, G. cuniculus, Protocanites careyi, and Cantabricanites jelli. Several species that are probably new are described under open nomenclature.