Antonio Stoppani

Samuele Sozzi, Antonio Stoppani e Luca Inzerillo
Samuele Sozzi, Antonio Stoppani e Luca Inzerillo

Basta digitare su google o qualsiasi altro motore di ricerca, oppure cliccare qui sul suo nome Antonio Stoppani per rendersi conto di quanto materiale ci sia su di lui…

Indubbiamente, avrete notato, è stato una figura importantissima per la Geologia, la stratigrafia e la Paleontologia in Italia.

E sono proprio due amici Geologi,  Luca Inzerillo e Samuele Sozzi che, durante l’esplorazione di alcune grotte della Grigna Meridionale (o Grignetta), hanno fatto e poi concesso a scienzafacile.it questo simpatico scatto in onore dell illustre Professore!

Il mezzo busto si trova appena fuori dal Rif. Rosalba.

Le Grigne furono proprio area di studio per l’Abate Stoppani che interpretò la loro origine e giacitura come un complesso sistema di pieghe (raffigurate anche in un suo libro, foto qui sotto), Il tempo e gli studi successivi non gli diedero ragione in quanto Il gruppo delle Grigne, che comprende anche il monte Coltignone, è formato da un sistema di sovrascorrimenti che ha prodotto delle SCAGLIE …embricate, proprio come quelle di alcuni pesci o se preferite come le tegole di un tetto…

grigne-stoppani
Il gruppo delle Grigne - Indicata con bollo rosso la Grigna meridionale o Grignetta e in blu la Grigna Settentrionale o Grignone

Grazie Samuele e Luca per questa bella immagine e arrivederci a tutti alla prossima foto del mese su scienzafacile!

L’Estate è alle porte!

Stefano Rossignoli 14 maggio 2011

Passo Sella, fioritura di crochi
Nei pressi del Passo Sella a m2100 circa, stupenda fioritura di Crocus

La neve lascia spazio ad immense fioriture di Crocus

Non sono un botanico e non mi spingo oltre nella determinazione. Già Crocus e Colchicum si confondono facilmente se non si è del mestiere.

Io ne godo semplicemente la poesia!

Se nei commenti qualcuno volesse dare maggiori precisazioni, ben venga…

I bivalvi d’acqua dolce…

Stefano Rossignoli – 11 marzo 2011

Bivalve d'acqua dolce

Ebbene anche io ho deciso di pubblicare una ‘foto del mese’.

Il mio però è stato solo uno scatto fortunato, ma lo metto in mostra lo stesso, senza la pretesa di essere un fotografo!!! Complice una settimana passata a lavorare tra i campi e fossi e canali di irrigazione ecco che mi imbatto in un bivalve d’acqua dolce del genere Anodonta.

I bivalvi come questo, vivono comunemente infossati nel sedimento di fondo e filtrano grandi quantità d’acqua, date anche le grandi dimensioni che possono raggiungere, (fino a 20cm di lunghezza) nutrendosi dei microorganismi in essa contenuti.

Anche se l’ho scovato all’esterno del sedimento, questo individuo è vivo e vegeto in quanto è chiuso.

I bivalvi infatti hanno muscoli per tener chiuse le valve, ma non ne hanno per aprirle. Per aprire le valve è presente un legamento elastico. Quando il mollusco muore, i muscoli non tengono più le valve chiuse, quindi il legamento è libero di far aprire le valve che poi quasi sempre si disarticolano…

Un bivalve con le valve chiuse, è quindi solitamente un bivalve vivo! …come questo tranquillo Anodonta sp nei dintorni del ‘Boscaccio’ (sud – ovest  Milano)…

 

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